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{
"id": "9a6aaf68-9a64-46e7-b760-def5668769c1",
"kind": "sos",
"name": "10.000€ live Datenrettung von einer live zerstörten Festplatte",
"slug": "10000-live-datenrettung-von-einer-live-zerstorten-",
"url": "https://api.events.ccc.de/congress/2025/event/9a6aaf68-9a64-46e7-b760-def5668769c1/?format=api",
"track": null,
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"location": "Ewiger Lötworkshop / Blinkyparts",
"language": "de",
"description": "Wir suchen einen Fehler an einer def. Festplatte und beheben diesen (hoffentlich). Ich hatte einen Fall wo ein Datenrettungsunternehmen dafür 10.000€ haben wollte - die könnt ihr euch ggf. sparen oder selbst verdienen.\r\nEs gibt ein paar Tipps zur fehlersuche und reparatur von elekt. Schaltungen",
"schedule_start": "2025-12-28T16:00:00+01:00",
"schedule_duration": "00:45:00",
"schedule_end": "2025-12-28T16:45:00+01:00"
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{
"id": "c7459c12-f8d6-4c2a-959a-01271c679fab",
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"name": "101 - KinkyGeeks + RopeLabs Beginner Bondage Workshop Part I",
"slug": "kinkygeeks-ropelabs-beginner-bondage-workshop-1",
"url": "https://api.events.ccc.de/congress/2025/event/c7459c12-f8d6-4c2a-959a-01271c679fab/?format=api",
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"description": "KinkyGeeks and RopeLabs join forces to host a Beginner Bondage Workshop.\r\n\r\nInstructors @DoodleMe and @KnottyLola will guide you through the foundations of Japanese rope bondage, also known as Shibari.\r\n\r\nYou will learn core safety concepts, basic theory, and a small set of beginner-friendly knots. These are practical ties you can use at home and that form the base for more complex work later.\r\n\r\nThis is a peer-based workshop aimed at complete beginners. No prior experience is needed. Singles, pairs, and small groups are all welcome.\r\n\r\nThe workshop runs in lab mode. There is no sexual content and everyone remains fully clothed. The space is 18+ only.\r\n\r\nPlease bring your own non-stretch rope if you have it. Practice rope will be available. Bring a blanket or cushion to sit on the floor comfortably. There is no dress code, but fitted clothing makes tying easier than loose layers.\r\n\r\nThe workshop will be taught in English.\r\n\r\nPlaces are limited by room size. You will need a ticket per person. Get your free ticket here: [https://ticket.kinkygeeks.de/kinkygeeks/101-1/](https://ticket.kinkygeeks.de/kinkygeeks/101-1/)",
"schedule_start": "2025-12-27T14:00:00+01:00",
"schedule_duration": "01:50:00",
"schedule_end": "2025-12-27T15:50:00+01:00"
},
{
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"kind": "sos",
"name": "15 Minute Stretching Session",
"slug": "15-minute-stretching-session_ddd3",
"url": "https://api.events.ccc.de/congress/2025/event/bcafa582-aa1e-42a7-aa5c-cfdab5a75c98/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Hall H, Zettascope",
"language": "de, en",
"description": "Walked a lot? Sat a lot? Been on the congress all day with a backpack?\r\n\r\nYour body is protesting the daily strain. In this self‑organized session we’ll work together to ease some of that pain with targeted stretching exercises.\r\n\r\nAbout me:\r\nHi, I’m Leon, a media‑informatics student and programmer. I spend many hours at the computer — often sitting. Today I’ll share the daily routine that has helped me successfully combat my back and neck discomfort.\r\n\r\nDisclaimer: I am neither a doctor nor a physiotherapist. The exercises presented are simple and safe, but if you have acute issues you should always consult a professional.",
"schedule_start": "2025-12-29T14:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T14:55:00+01:00"
},
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"name": "15 Minute Stretching Session",
"slug": "15-minute-stretching-session",
"url": "https://api.events.ccc.de/congress/2025/event/e6522b72-5231-4594-8729-46acca729d5a/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Saal D",
"language": "de, en",
"description": "Walked a lot? Sat a lot? Been on the congress all day with a backpack?\r\n\r\nYour body is protesting the daily strain. In this self‑organized session we’ll work together to ease some of that pain with targeted stretching exercises.\r\n\r\nAbout me:\r\nHi, I’m Leon, a media‑informatics student and programmer. I spend many hours at the computer — often sitting. Today I’ll share the daily routine that has helped me successfully combat my back and neck discomfort.\r\n\r\nDisclaimer: I am neither a doctor nor a physiotherapist. The exercises presented are simple and safe, but if you have acute issues you should always consult a professional.",
"schedule_start": "2025-12-28T14:30:00+01:00",
"schedule_duration": "00:20:00",
"schedule_end": "2025-12-28T14:50:00+01:00"
},
{
"id": "88b4280a-928c-4ef6-9f43-f7d0e64a8d49",
"kind": "sos",
"name": "1D-CON: 1D-Game-Developers Conference",
"slug": "1d-con-1d-game-developers-conference_9i76",
"url": "https://api.events.ccc.de/congress/2025/event/88b4280a-928c-4ef6-9f43-f7d0e64a8d49/?format=api",
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"language": "en, de",
"description": "We who are interested in the future of 1D-Gaming know, that Pong is only the tip of the iceberg regarding the 1D-gaming industry. At 39c3 this year will be the largest gathering in the history of 1D-Game-Development. Single Dimension Studios will present their new sports title CURLING. Team1, the developers of retro classic WORM will present their new roguelike DARKEST ROAD. Highlight will be the presentation of the first 1D-Gaming-Console in the history of gaming: The Linear Entertainment System (LES). The rest of the program will include talks and teasers for RPG titles like BENEATH APPLE TOWER and DWARF SHAFT, sports titles like LINE DANCER 2025, TONY FAWK'S SLACK LINER PRO and many many more. Seats are limited due to press interest, arriving early suggested.",
"schedule_start": "2025-12-30T12:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T12:25:00+01:00"
},
{
"id": "c4cee171-6cc2-4992-ac11-31b650a27adf",
"kind": "sos",
"name": "39C3 Schedule App users meetup",
"slug": "39c3-schedule-app-users-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/c4cee171-6cc2-4992-ac11-31b650a27adf/?format=api",
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"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
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"language": "en",
"description": "# About\r\n- In this session you can talk to the maintainer of the Congress app (for Android) in person.\r\n- Bring **your questions and feedback**. Feel free to send a private message (*@tbsprs@chaos.social*) before.\r\n- Existing issues are collected in the [GitHub repository](https://github.com/EventFahrplan/EventFahrplan/issues).\r\n\r\n# Languages\r\n- I am able to talk both English and German.\r\n\r\n# Not a workshop\r\n- This will **not** be a workshop format to set up the project nor to program together.\r\n\r\n# Links\r\n- [Project website](https://eventfahrplan.eu)\r\n- [Source code repository](https://github.com/EventFahrplan/EventFahrplan/issues)\r\n- [Translation platform](https://crowdin.com/project/eventfahrplan)",
"schedule_start": "2025-12-27T21:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T21:50:00+01:00"
},
{
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"kind": "sos",
"name": "A Decentralized Social Layer for the Web - Meeting People on All Pages",
"slug": "a-decentralized-social-layer-for-the-web-meeting-p",
"url": "https://api.events.ccc.de/congress/2025/event/69d4a5b0-233a-4b18-aa72-771a37d3600d/?format=api",
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"language": "en",
"description": "There is a virtual world that we visit every day. It has billions of inhabitants and billions of places. But, whenever we go, there is nobody. Just the messages they left. We read our daily online newspapers while many are doing the same. We are browsing the same content - but we are still alone. If only we could see the other people browsing the same content at the same time. They might be interested in the same things right now. \r\n\r\nImagine the real world without all the people on the streets. Streets and places, shops, cafés, libraries, deFV\r\nvoid of people. That's the Internet, the Web as it currently exists. Always has been like that and we got used to it. But we wanted more. We wanted social interactions. We got Social Networks and they turned into meme feeds and brain rot. That's not what we asked for.\r\n\r\nWe asked for people, real people. And they are already there. What if we make them visible to each other? Then, ad-hoc communities can form directly at the content. Communities of like-minded people, interested in the same things. \r\n\r\nAll we need is a federated social layer that cannot be owned, because it is decentralized as the Web itself. An infrastructure of some existing chat protocol in the spirit of the Fediverse or XMPP. \r\n\r\nA new way to communicate everywhere, not just in Social Media silos, not after giving up your profile. We want to talk to the people we meet wherever we go. We want to reclaim the Web. \r\n\r\nHere is how we do it\r\n\r\nCreating a decentralized social layer independent of Social Media silos.",
"schedule_start": "2025-12-29T11:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T11:50:00+01:00"
},
{
"id": "6f007543-e51d-4087-8683-69614b9e1d3f",
"kind": "sos",
"name": "Against Antisemitsm Jewish Safe Space",
"slug": "against-antisemitsm-jewish-safe-space",
"url": "https://api.events.ccc.de/congress/2025/event/6f007543-e51d-4087-8683-69614b9e1d3f/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
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"language": "de, en",
"description": "Are you jewish or feel connected?\r\nAre you affected by antisemetism or want know what can be done against it?\r\n\r\nWe want to provide a safe space.\r\nCome by. Let's have a chat or grab a drink together.",
"schedule_start": "2025-12-30T15:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T15:25:00+01:00"
},
{
"id": "50f84650-372b-4129-8145-36dfccbb1323",
"kind": "sos",
"name": "\"A.I.\" done right: \"Tsetlin Machine\" (TM) from Norway: Transparent, efficient, FOSS Machine Learning!",
"slug": "ai-done-right-lets-brainstorm-use-cases-for-the-ts",
"url": "https://api.events.ccc.de/congress/2025/event/50f84650-372b-4129-8145-36dfccbb1323/?format=api",
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"location": "3. Floor between Hall Zero and Wine Bar, on the sitting blocks!!!!",
"language": "en, de",
"description": "### Language & Location: \r\n* Something went wrong with location booking: For now, we could meet on the blocks **in front of Hall Zero, near \"Wine Bar\", \"Level 3\".**\r\nProbably English to reach everyone. I am fluent in German & English.\r\n\r\n### What & why:\r\n* \"CCC Media\" leads to 0 search entries for \"TM - Tsetlin Machine\", tho highly relevant for ethical A.I., embedded, FOSS & much more! \r\n* Based on simple propositional logic (Boolean), very efficient & transparent, FOSS! \r\n* Runs \"In memory\" mostly! And in just kB to MB of RAM, many use cases!\r\n\r\n* I could give a short introduction, but mainly want to raise awareness on its enormous potential. \r\n* To try it & deploy it yourself, search Github; and ask A.I. for: \"weighted TM\", \"sparse TM\", \"fuzzy-pattern TM\", ...\r\n* Most complete starting point: \r\nhttps://github.com/cair/tmu\r\n\r\n### Some Use Cases among many more: \r\n* Transparent on-device IoT security \r\n* Acceleration (of all sorts) \r\n* Linux real-time security in general?? \r\n* soon: Scalability into GB of RAM as well! \r\n* Autonomous systems\r\n* Funny \"in RAM\" Demos.... \r\n\r\n### Newest model \"graph TM\" with long explanation, only for geniuses: \r\nhttps://arxiv.org/html/2507.14874v1\r\n\r\n### Contact on my profile, @FoxinSocks",
"schedule_start": "2025-12-27T11:11:00+01:00",
"schedule_duration": "00:50:00",
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},
{
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"kind": "sos",
"name": "ajuvos hörertreffen",
"slug": "ajuvos-horertreffen",
"url": "https://api.events.ccc.de/congress/2025/event/ab5458d6-87ea-40c2-88c5-0eee974eff1a/?format=api",
"track": null,
"assembly": "sos",
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"location": "c-base Halle H am Turm",
"language": "de",
"description": "podcast meetup (podcasts & meetup in German)",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "00:45:00",
"schedule_end": "2025-12-28T17:45:00+01:00"
},
{
"id": "a836ca70-b751-47ae-9d9d-2bc0d51e8fdd",
"kind": "sos",
"name": "All CTFers and PWNers welcome: Pwndbg meetup",
"slug": "all-ctfers-and-pwners-welcome-pwndbg-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/a836ca70-b751-47ae-9d9d-2bc0d51e8fdd/?format=api",
"track": null,
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"description": "Meetup for discussing all things regarding the Pwndbg project\r\n(https://pwndbg.re/dev/) and its development, PWNing, binary exploitation and reverse engineering!\r\n\r\nPwndbg is an open source tool for reverse engineering, exploit development and low level debugging which can be used with GDB and LLDB.\r\n\r\nWe will host a presentation/demo of Pwndbg and its features - also - synchronization with decompiler of your choice (ida/binja/ghidra/angr). We may also talk some stuff about its development process. If the time allows, we will have a Q&A and discussion time.\r\n\r\nWe welcome all users, newcommers, pwners and CTF players!\r\n\r\nOrganized by Disconnect3d & k4lizen",
"schedule_start": "2025-12-29T18:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T18:25:00+01:00"
},
{
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"kind": "sos",
"name": "Alles smart und sicher? Oder nur Schall und Rauch? Zu den Datenspuren smarter Rauchmelder.",
"slug": "alles-smart-und-save-oder-nur-schall-und-rauc_gz4c",
"url": "https://api.events.ccc.de/congress/2025/event/6998ed32-bb30-44df-af58-4b31dd9e7788/?format=api",
"track": null,
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"language": "de",
"description": "‘New smoke detectors spy on tenants – and they have to pay for it’ was the headline in Stern magazine on 5 November 2024. The ‘smart’ smoke detectors referred to in the article have sensors that can detect fires and also measure ‘personal climate data’, transmitting it wirelessly [2, 3]. Consumer advocates have warned of infringements on personal rights [4, 5], and the topic has also sparked heated discussions within the community [6]. However, Techem claims that neither landlords nor they can determine which rooms someone is currently in. It is also not possible to track whether people are leaving the apartment or coming home” [3]. [3].\r\n\r\nWorkshop schedule:\r\nIn about 10 to 15 minutes, we will introduce the topic of simple sensor data in the smart home. We will present examples of simple sensors from our research and explain how they were created using our sensor kit [7–9].\r\n \r\n\r\nThe second part is a joint 'data guessing game'. We will examine selected data traces that could have been generated by smart smoke detectors, such as the 'Multisensor Plus', and similar devices*, and attempt to collectively analyse the data and classify it. \r\n\r\nThe final 20–25 minutes of the workshop will be reserved for reflection.\r\nHow meaningful is simple sensor data from the home?\r\nWhat impact can this sensor data have on privacy?\r\nHow should we deal with it?\r\n\r\n[1] https://www.stern.de/wirtschaft/immobilien/vonovia-skandal--neue-rauchmelder-spionieren-mieter-aus—35199846.html, accessed 9 July 2025.\r\n[2] https://www.vonovia.de/weitere-angebote/multisensor-plus – accessed 16 July 2025.\r\n[3] https://www.techem.com/de/de/geraete/multisensorplus-datenschutz — accessed 24 October 2025.\r\n[4] https://www.zeit.de/digital/datenschutz/2024-10/rauchmelder-vonovia-mieter-datenschutz-smart – accessed 16 July 2025.\r\n[5] https://www.swr.de/swraktuell/baden-wuerttemberg/ulm/mieter-wehren-sich-gegen-teure-rauchmelder-von-vonovia-100.html – accessed 16 July 2025.\r\n[6] https://chaos.social/@evawolfangel/113357161708038023 – accessed 24 October 2025.\r\n[7] https://doi.org/10.1109/CIVEMSA53371.2022.9853698\r\n \r\n[8] https://doi.org/10.18420/muc2024-mci-ws17-153\r\n[9] https://doi.org/10.18420/inf2024_65 \r\n\r\n* Average hourly temperature and humidity values per room (according to [3]).\r\n\r\nAbout us:\r\n\r\nKarola: I combine social, educational and technical perspectives, with a particular interest in hacking, the Internet of Things and digital education issues in the context of privacy and AI. Karola is active in the Chaos Computer Club Chemnitz.\r\n\r\nAlbrecht: I develop, research and teach at the intersection of human-computer interaction and the Internet of Things. I focus on smart connected objects in everyday life and how people interact with them. I also consider the impact this has on their privacy.\r\n\r\nSimplications: Simplications researches the implications of supposedly simple sensor data in the home. It is a joint project of Chemnitz University of Technology, Anhalt University of Applied Sciences and the Saxony Consumer Advice Centre, as part of the programme 'Privacy Platform: Supporting citizens in exercising their fundamental right to informational self-determination”. Simplications is funded by the Federal Ministry of Research, Technology, and Space (FKZ 16KIS1868K).\r\nhttps://simplications.tucmi.de\r\n\r\nThe workshop will be held mostly in German.",
"schedule_start": "2025-12-29T18:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T19:50:00+01:00"
},
{
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"kind": "sos",
"name": "Analog Photography Meet-Up",
"slug": "analog-photography-meet-up",
"url": "https://api.events.ccc.de/congress/2025/event/157fdb5e-6058-4ec4-818c-d90f4c830d32/?format=api",
"track": null,
"assembly": "sos",
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"location": "Foyer bei der Fairydust, wenn es schön ist gehen wir raus",
"language": "de, en",
"description": "Meet-Up for everyone who can be enthused to talk about analog photography. Lets talk about this fun, interesting and not that practical hobby.\r\n\r\nFeel free to bring your camera too",
"schedule_start": "2025-12-27T15:10:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-27T16:40:00+01:00"
},
{
"id": "daf0010a-b212-47ea-8944-1dc8965968de",
"kind": "sos",
"name": "Analog Synthesizer Basics",
"slug": "analog-synthesizer-basics",
"url": "https://api.events.ccc.de/congress/2025/event/daf0010a-b212-47ea-8944-1dc8965968de/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "BEAT Assembly in the c-base cluster",
"language": "de, en",
"description": "Sounds should be built from waves, not bits and bytes! Come along and I'll show you how analog synthesizers are structured and how to use them. Create your own small patches, turn the knobs like crazy and play your own sequences. Oscillators, filters, waveshapers, feedback – discover the magic box of analog sound synthesis! You can not only hear the effects, but also see them on an oscilloscope. If you have your own equipment, feel free to bring it along and we'll jam together.\r\n\r\nTime slots are updated from time to time, but you can also try your luck at any time!",
"schedule_start": "2025-12-27T14:00:00+01:00",
"schedule_duration": "00:42:00",
"schedule_end": "2025-12-27T14:42:00+01:00"
},
{
"id": "b741c8a8-5fbe-4afa-8bac-0ae162c7cd85",
"kind": "sos",
"name": "Anarchistischer Antifaschismus, Queere Präfiguration, Progressive Streitkultur & Intersektionale Bündnisse",
"slug": "anarchistischer-antifaschismus-queere-prafiguratio",
"url": "https://api.events.ccc.de/congress/2025/event/b741c8a8-5fbe-4afa-8bac-0ae162c7cd85/?format=api",
"track": null,
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"language": "de, en",
"description": "Nachdem die ursprünglich für 14:30 an Tag 3 geplante Session dem migrantischen Widerstand umgewidmet wurde, hier nochmal ein neuer Termin.\r\n***\r\n\r\nDiese Session wird sich aus den Erfahrungen und Begegnungen der bisherigen 39c3 ChaosTage speisen. Und wird den Versuch unternehmen, einige begonnene Überlegungen gemeinsam mit euch fortzuführen. Mehr Gespräch als Vortrag. Mehr gemeinsame Suchbewegungen vollführen, als für alles Antworten zu erwarten. \r\n\r\nWir werden um folgende Themen kreisen, streifen und streicheln:\r\n\r\n+ Präfiguration, ja gerne, aber wie? Wer mit wem? Und wozu?\r\n+ Konflikte gehören zum Leben dazu, bei der Aushandlung von Bedürfnissen, und darüberhinaus, das ist nicht immer Friede, Freude, Eierkuchen, aber mit ein bischen üben und Bewusstseinskultur wird das was mit dem konstruktiv Streiten und Konflikte positiv transformieren\r\n+ Ist Anarchismus als Begriff heute noch brauchbar? Praktisch, nicht theoretisch.\r\n+ Wie bekommen wir es hin, dass beim Antifaschismus alle zusammen gegen den Faschismus arbeiten? #widersetzen, und intersektional(er) darüberhinaus. \r\n+ Oder wenn wir es anders nennen, unser gemeinsames Ziel dabei nicht verloren geht: eine für alle Lebewesen friedvolle, liebevolle, achtsame, freudvolle Welt in der die wechselseitigen Bedürfnisse uns die Orientierung für unser Handeln geben (so zumindest 1 Serviervorschlag von mir) und die Möglichkeiten und Ressourcen im Blick bleiben, wie wir das (um-)verteilen was es gibt, und die Verteidigung gegenüber denjenigen, die das nicht wollen und uns weiter angreifen werden. \r\n+ Welche Kompetenzen und Reflexionsfähigkeiten fehlen uns aktuell noch, um belastbare intersektional orientierte (Kampf-)Bündnisse zu schmieden und aufrechtzuerhalten?\r\n+ Und wofür das Ganze? (nochmal ein Ausblick Richtung Utopie? We will see...\r\n\r\nFreue mich auf bekannte und neue Gesichter und Körper. \r\n\r\nLassen wir es glitzern und knallen, mit viel Alerta, alles Allen und bunten Einhörnern.",
"schedule_start": "2025-12-30T13:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-30T14:20:00+01:00"
},
{
"id": "a4fe2316-1322-40e7-beed-96ab8a237fd3",
"kind": "sos",
"name": "anders streiten lernen",
"slug": "anders-streiten-lernen",
"url": "https://api.events.ccc.de/congress/2025/event/a4fe2316-1322-40e7-beed-96ab8a237fd3/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de, en",
"description": "We live in times of intense conflicts and their violent escalation. One of the central theses of Jalka's work is that a viable democracy and a conscious culture of constructive conflict resolution go hand in hand.\r\n\r\nCultivating this ability requires a conscious decision to engage with individual, collective and societal patterns of dispute behaviour and conflict management. Starting with oneself, as well as in our interactions with others, in public discourse and in our behaviour towards others. With a willingness to change something in order to reduce, and in the best case even prevent, the suffering and violence that can potentially arise from conflicts. And to learn from this for the future. \r\n\r\nWhat exactly will this SOS session be about? \r\n\r\nWe will engage in a number of exercises and discussion rounds based on the following questions:\r\n\r\nHow do you deal with conflicts? How do others deal with conflicts? How do you experience conflicts? What exactly are conflicts? What dynamics promote conflicts? What patterns are there in place? How can we deal with conflicts constructively? How do conflicts caused by individual, interpersonal and structural factors differ? And: How can conflict management be designed to be sensitive to discrimination? \r\n\r\nI will share with you my experiences from my work as a mediator and from past workshops I have held on this topic. In addition to exercises, I will also bring along some literature for further reading.\r\n\r\nPlease feel free to bring your own questions and insights to the session so that we can all learn from and with each other. I look forward to seeing you. \r\n\r\nin parts translated with DeepL.com (free version)",
"schedule_start": "2025-12-27T16:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-27T17:50:00+01:00"
},
{
"id": "e5478a45-cbac-4b26-b2e8-430e0f045993",
"kind": "sos",
"name": "Angebote zum Junghacker*innentag rund um Mathematik (inklusive mathematische Zaubertricks! Erwachsene auch willkommen)",
"slug": "angebote-zum-junghackerinnentag-rund-um-mathematik",
"url": "https://api.events.ccc.de/congress/2025/event/e5478a45-cbac-4b26-b2e8-430e0f045993/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "cyberEDU-Assembly in Halle H, Ebene 0, Planquadrat J2",
"language": "de",
"description": "**Zu allen Workshops kann man in der Zeit von 10:30 Uhr bis 14:00 Uhr kommen und gehen, wann man möchte!** Eine Anmeldung ist nicht erforderlich. Der Ort kann sich kurzfristig ändern, hier und nur hier gibt es die aktuelle richtige Information. Aktuell ist als Ort die [cyber4EDU-Assembly](https://39c3.c3nav.de/l/305bb22a-f02f-4596-837e-83ee6727effe/) geplant. Bei allen Fragen direkt anrufen: +4917695110311.\r\n\r\n**Unendlich große Zahlen.** In der Mathematik geht es nach 1, 2 und 3, nach der Million und der Fantastilliarde erst richtig los: Danach kommen die unendlich großen Zahlen. Los gehen die mit „∞“, der ersten unendlich großen Zahl, aber dann geht es noch lange weiter. Mit diesen Zahlen kann man wunderbar Spiele spielen. Vielleicht kennt der eine oder andere das Streichholzspiel, bei dem zwei Spieler abwechselnd immer bis zu drei Streichhölzer wegnehmen können und derjenige gewinnt, der das letzte Streichholz an sich nimmt. Im Workshop werden wir lernen, wie man dieses Spiel mit unendlich vielen Streichhölzern spielt, und wie der Trick aussieht, um immer zu gewinnen.\r\n\r\n**Cosmic Call.** Vor etwa 20 Jahren schickte die Menschheit eine Radiobotschaft an ausgewählte Sterne, in der Hoffnung, dass die Nachricht Außerirdische erreicht, diese die Nachricht verstehen und uns antworten. Die Nachricht ist nicht auf Deutsch oder Englisch verfasst, sondern bedient sich einer eigens entwickelten Symbolsprache. Schaffen wenigstens wir Menschen, die Botschaft zu entziffern? Das wollen wir in dem Workshop an uns selbst testen und herausfinden!\r\n\r\n**Zauberwürfel.** Wie löst man den Zauberwürfel (Rubik's Cube)? Das üben wir in diesem Workshop. Wer einen eigenen Zauberwürfel hat, kann ihn gerne mitbringen; für alle anderen haben wir Würfel zum Verleihen. Keinerlei Vorkenntnisse nötig.\r\n\r\n**Vierte Dimension.** In unserer Welt können wir uns nach links und rechts, nach hinten und vorne sowie nach unten und oben bewegen. Weitere Richtungen gibt es nicht. Das muss aber nicht so sein! In der Mathematik ist auch eine weitere Dimension vorstellbar. In diesem Workshop lernen wir diese vierte Dimension spielerisch und anschaulich kennen. Anhand eines interaktiven vierdimensionalen Labyrinths erkunden wir in diesem Workshop spielerisch die vierte Dimension. In der vierten Dimension gibt es neue wundersame Formen zu bestaunen, gewöhnliche dreidimensionale Gefängnisse wären nicht mehr ausbruchssicher und Schnürsenkel würden sich ständig von selbst entknoten. Wer schon etwas älter ist (ab etwa achte Klasse) und Englisch ganz gut versteht, kann statt zu diesem Workshop auch zum 60-minütigen Abendvortrag zum Thema kommen.\r\n\r\n**Beweise ohne Worte.** In der Schule besteht Mathematik zu einem großen Teil aus Rechnungen. Das ist aber nicht das, was Mathematik wirklich ausmacht! Mathematik ist die Kunst, das Verborgene auf das Offensichtliche zurückzuführen, und dazu gehören ergreifende emotionale Aha-Momente beim Verstehen von Zusammenhängen. In diesem Workshop behandeln wir grafische Beweise.\r\n\r\n**Mathematische Zaubertricks.** Erlebe und lerne verrückte Zaubertricks mit Münzen und Spielkarten!\r\n\r\n**Dodekalender.** Bastele einen Kalender für das Jahr 2025 im tollen Dodekaeder-Format!\r\n\r\n**[Materialien](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-28T10:30:00+01:00",
"schedule_duration": "03:30:00",
"schedule_end": "2025-12-28T14:00:00+01:00"
},
{
"id": "bbfa4925-b56a-4649-9c49-4a048b021b47",
"kind": "sos",
"name": "Antifa-Ost Komplex - What´s with this terrorist organization?",
"slug": "repression-gegen-antifaschistinnen-im-antifa-ost-u",
"url": "https://api.events.ccc.de/congress/2025/event/bbfa4925-b56a-4649-9c49-4a048b021b47/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "The number of house searches, surveillance, and intimidation methods used by Saxon authorities in particular, such as SOKO Linx, in recent years is simply immeasurable. \r\nWe would like to give you an overview of the proceedings to date and those currently underway. What investigative methods does paragraph 129 allows? Who are the Nazis, anyway? And why is solidarity important when Trump wants to destroy “Antifa”?",
"schedule_start": "2025-12-29T19:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T19:25:00+01:00"
},
{
"id": "20b176e6-7297-4d5d-9504-d7666e865d22",
"kind": "sos",
"name": "Antifa Recherche Meetup",
"slug": "antifa-recherche-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/20b176e6-7297-4d5d-9504-d7666e865d22/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Saal 5",
"language": "de",
"description": "Do you do (anti-fascist) research work? do you have OSINT skills? are you familiar with web scraping? Do you have insight into right-wing structures? We want to sit down together to exchange ideas about what anti-fascist education and research work in the digital area can look like, to exchange experiences and competencies and to network.",
"schedule_start": "2025-12-28T19:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T20:00:00+01:00"
},
{
"id": "82604a07-0548-4ad5-8d0b-2dd7bbf0e0e1",
"kind": "sos",
"name": "A Primer on LLM Security and Secure LLMOps",
"slug": "a-primer-on-llm-security",
"url": "https://api.events.ccc.de/congress/2025/event/82604a07-0548-4ad5-8d0b-2dd7bbf0e0e1/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en, de",
"description": "## Post-Session Material\r\n\r\nThank you for participating! :)\r\nThe slides are available here: [Slides (PDF) via Slideshare](https://de.slideshare.net/secret/1UNWblpgKTSoSR)\r\n\r\nYou are welcome to get in touch, either here (until Day 4) or via the contact information in the slides.\r\n\r\n## Session\r\n\r\nLarge Language Models (LLMs) have taken the world by storm. Alongside their vast potential, these models also present unique security challenges. This session will serve as a primer on LLM security and secure LLMOps, introducing key issues and concepts related to the security of LLMs and systems relying on them. For example, we will be looking at issues such as prompt injection, sensitive information disclosure, and issues related to the interaction of LLMs with the “outside world” (e.g., plugins or APIs, RAG, Agentic AI). Of course, we are also going to briefly look at how to red-team LLMs.\r\n\r\nThis session is based on previous iterations of “A Primer on LLM Security” at Congress and, based on audience feedback, has been extended and developed further.\r\n\r\n\r\nThis session is based on previous iterations of “A Primer on LLM Security” at Congress and, based on audience feedback, has been extended and developed further.\r\n\r\n## Target Audience and Required Previous Knowledge\r\n\r\nThis session targets beginners and does not assume (in-depth) knowledge about LLMs. If you have prior experience in LLM security and anticipate insights into the latest developments, this session most likely is not for you.\r\nPlease note that this session will not be about using LLMs in offensive or defensive cybersecurity.\r\n\r\n## Learning Objectives\r\n\r\nFrom a learning perspective, after the session, participants will be able to …\r\n\r\n* describe what LLMs are and how they fundamentally function.\r\n* describe LLMOps and outline fundamental principles of secure LLMOps.\r\n* describe common security issues related to LLMs and systems relying on LLMs.\r\n* describe what LLM red teaming is.\r\n* perform some basic attacks against LLMs to test them for common issues.\r\n\r\n## About Me\r\n\r\nMy Name is Ingo, and I am currently responsible for Digital Education and Educational Technology at the University of Cologne. Relevant to this session, I have a background in computational linguistics and have been working with LLMs for quite some time – also prior to the ChatGPT moment. I am also involved in developing and providing AI infrastructure at scale. Of course, all of this is embedded within a deep interest in cyber- and information security.\r\n\r\n## Format\r\nThe session will be split into a 45-minute talk as well as 15 minutes of discussion. Participants will be provided with the slides as well as some resources for further study.\r\n\r\n## Technical Requirements\r\n As this will not be a highly hands-on session, there are no technical requirements. If you want to experiment with some of the topics, a device capable of accessing and/or running LLMs is necessary. If you want to “go deeper,” you will need a device – e.g., a laptop, capable of running LLMs locally.\r\n\r\n## Material\r\n\r\nAfter the session, I will provide all materials, including some selected additional resources. All materials will also be provided via this page.\r\n\r\n[Slides (PDF) via Slideshare](https://de.slideshare.net/secret/1UNWblpgKTSoSR)\r\n\r\nPs. This is a slightly updated version of the workshop(s) I gave at previous iterations of Congress.",
"schedule_start": "2025-12-28T10:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T11:50:00+01:00"
},
{
"id": "4da4f58e-17fc-4a61-8024-362cd435c96a",
"kind": "sos",
"name": "A primer to constructive mathematics, where every result has a geometric interpretation and every proof gives rise to an algorithm",
"slug": "a-primer-to-constructive-mathematics-where-every-r",
"url": "https://api.events.ccc.de/congress/2025/event/4da4f58e-17fc-4a61-8024-362cd435c96a/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "next to Pixelebbe (Layer 2, G6)",
"language": "en",
"description": "📍 The location of this session might change, please check here again before the session starts. **The location is currently set to be [next to Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Layer 2, G6).** We will sit on the floor and won't have much space because we don't want to obstruct escape routes.📍\r\n\r\nThis session is for people who have some experience in proving, for instance because they are studying mathematics or a related field such as computer science or physics.\r\n\r\nConstructive mathematics is a flavor of mathematics in which we use the axiom of choice and the technique of proof by contradiction only in certain special cases. The square root of two is constructively still irrational, but there might be vector spaces without a basis.\r\n\r\nAs a result, proofs are more informative (for instance regarding bounds), finer distinctions can be made (for instance between positive existence and mere impossibility of non-existence) and results apply more generally: Every constructive result also has a geometric interpretation, where it applies to continuous families, and an algorithmic interpretation, yielding computational witnesses such as procedures for computing the objects whose existence has been shown.\r\n\r\nRelinquishing the axiom of choice and the principle of excluded middle also allows us to explore axioms and notions which are incompatible with these classical laws, such as mathematical settings in which all functions are continuous or in which the intuitive idea of a “generic ring” can be put on a firm basis.\r\n\r\n**[Notes](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-29T17:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T17:55:00+01:00"
},
{
"id": "971feebb-fb42-4d9a-808f-058206dae7b9",
"kind": "sos",
"name": "\"Art and Play\" in leichter Sprache",
"slug": "art-and-play-in-leichter-sprache",
"url": "https://api.events.ccc.de/congress/2025/event/971feebb-fb42-4d9a-808f-058206dae7b9/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Halle H, in der Ausstellung bei der Bar",
"language": "de",
"description": "Auf dem Congress gibt es viel Kunst.\r\nEs gibt Führungen, bei denen wir die Kunst gemeinsam anschauen.\r\nDie Führungen gibt es auch in leichter Sprache.\r\n\r\nEs gibt zwei verschiedene Führungen.\r\nEine heißt \"call for art\" (Aufruf für Kunst).\r\nDie zweite heißt \"art and play\" (Kunst und Spiel).\r\nBeide Führungen dauern ungefähr 1 Stunde.\r\n\r\nDie Führung \"art and play\" geht durch die Ausstellung in Halle H.\r\nWir treffen uns für \"art and play\":\r\nam 29.12.2025, um 14.30 Uhr, in der Ausstellung in Halle H.",
"schedule_start": "2025-12-29T14:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T15:30:00+01:00"
},
{
"id": "6660892d-1df3-4b32-ac2b-cbb2e162d353",
"kind": "sos",
"name": "Artificial life from random programs",
"slug": "artifitial-life-from-random-programs",
"url": "https://api.events.ccc.de/congress/2025/event/6660892d-1df3-4b32-ac2b-cbb2e162d353/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "Self-replicating programs spontaneously emerge from randomly initialized code in simple programming languages like Brainfuck, Forth, and assembly, without any designed replication mechanisms or fitness functions. Through self-modification and random interactions alone, these systems transition from \"pre-life\" chaos to \"life\" dynamics where replicators compete, evolve, and develop increasingly complex behaviors, offering new insights into how life itself might originate on any computational substrate.",
"schedule_start": "2025-12-30T12:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T12:50:00+01:00"
},
{
"id": "c61ab094-39d1-4730-a82a-87370f7d22c6",
"kind": "sos",
"name": "As close as it gets: Playing around with Enigma Touch",
"slug": "as-close-as-it-gets-playing-around-with-enigma-tou",
"url": "https://api.events.ccc.de/congress/2025/event/c61ab094-39d1-4730-a82a-87370f7d22c6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Vintage Computing Cluster, https://39c3.c3nav.de/l/c:0:156.91:157.63/",
"language": "de, en",
"description": "The Enigma Machine is one of the most iconic encryption machine. It's famous from books and movies and it was the nemesis that Alan Turing and his international team defeated at Bletchley Park.\r\n\r\nTrying a working original hands-on is almost impossible nowadays - they are sold at auctions for the price of a large family home. That's why several apps exist - and electronic replicas. One of them is Enigma Touch by Jürgen Müller. It is very close to the originals.\r\n\r\nIn the workshop, I'll explain how Enigma was used (as briefly as possible, no maths!), then we'll take a demo device and play around with it. I'm going to bring some historical messages that you can decrypt - or you come up with your own messages.\r\n\r\nIf you bring an Enigma app on your smart device or web browser, you can participate and exchange messages with the physical device - they are of course compatible to each other if implemented correctly.\r\n\r\nMy goal is to learn about didactics: How fast can my audience grasp the UI of Enigma Touch, how much do I need to explain to you, what are your FAQs? And you? Maybe you just want to try out the gadget.",
"schedule_start": "2025-12-27T19:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-27T20:00:00+01:00"
},
{
"id": "cffa9115-da0c-438b-a931-8bf26a644b91",
"kind": "sos",
"name": "A short talk on ThinClient based RetroPC gaming while installing Windows XP",
"slug": "a-short-talk-on-thinclient-based-retropc-gaming-wh",
"url": "https://api.events.ccc.de/congress/2025/event/cffa9115-da0c-438b-a931-8bf26a644b91/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "team23 assembly",
"language": "de, en",
"description": "Can you still do useful things with old (and really old) thin clients?\r\nThe following talk provides the answer, as well as tips and tricks to get you started. The focus is on DOS/Win98 and Windows XP.\r\n\r\nTo spice things up a little, I will install Windows XP during the talk to show a real live example.\r\n\r\nWith these XP clients, you can also organize a wonderful, energy-saving LAN party :) If you remember what a lan party actually is ....\r\n\r\nContact: waffle.ratters_9w@icloud.com",
"schedule_start": "2025-12-29T13:00:00+01:00",
"schedule_duration": "00:30:00",
"schedule_end": "2025-12-29T13:30:00+01:00"
},
{
"id": "9aafc631-b8f6-4b3a-93cd-700b40bed21c",
"kind": "sos",
"name": "Astrology as System of thought for Daily Routines (No Fate, No Woo)",
"slug": "astrology-as-a-reflection-tool-for-daily-routines-",
"url": "https://api.events.ccc.de/congress/2025/event/9aafc631-b8f6-4b3a-93cd-700b40bed21c/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "en",
"description": "Astrology is usually associated with horoscopes, prediction, or belief systems. In this self-organised session, we’ll test a different idea: using astrology as a symbolic language to reflect on daily routines, decision-making, and energy management — without fate, mysticism, or “the stars made me do it”.\r\n\r\nThe session is interactive and experimental. We’ll look at how astrological concepts can function similarly to tools people already use: retrospectives, calendars, personality models, or context-setting frameworks.\r\n\r\nThis is not about accuracy, belief, or convincing anyone. It is about usability:\r\n\r\nDoes this framing help reflection?\r\n\r\nWhere does it break down?\r\n\r\nWhen does it become annoying or meaningless?\r\n\r\nNo astrology background required. Critical perspectives are explicitly invited.\r\n\r\n- **Presentation (slides shared):** \r\n https://docs.google.com/presentation/d/1yYnfNnj1-JQ1y1ktCqc6a8R2b84gXZtqu2QwIBQ2EN4/edit?usp=sharing\r\n\r\n- **Group Chat (Signal):** \r\n https://signal.group/#CjQKIJrpHi5JhoNLiwBO0hXzhPmaCzJ9QQdr2yioP-7m_7dwEhD2HZkrlGzn50-Wvrtzsy8Y",
"schedule_start": "2025-12-27T11:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T11:50:00+01:00"
},
{
"id": "0ab07fa9-37af-4e57-a085-30adf2e45c9b",
"kind": "sos",
"name": "A tour of Netrunner, the card game",
"slug": "a-tour-of-netrunner-the-card-game",
"url": "https://api.events.ccc.de/congress/2025/event/0ab07fa9-37af-4e57-a085-30adf2e45c9b/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "SiliconForest assembly",
"language": "en",
"description": "Netrunner is a cyberpunk card game for two players.\r\n\r\nIn this game, one plays as Runner, a hacker(shaper)/criminal/anarchist looking for hidden Agendas, and another plays as Corp, laying out defenses to score agendas or seeking out to kill the Runner. \r\n\r\nIn this session, I will give you a brief tour to the game -- the basic rules, themes behind factions, and playstyles that have emerged out of the cards available within the game.\r\n\r\nLimited capacity: I can handle up to 6 participants for tour, and only 1 or 2 will be able to try out the game.",
"schedule_start": "2025-12-27T14:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-27T15:30:00+01:00"
},
{
"id": "908d3857-0a64-48bf-8a6d-1c5e71f67195",
"kind": "sos",
"name": "A Visit to the Catacombs of Dammtor",
"slug": "a-visit-to-the-catacombs-of-dammtor",
"url": "https://api.events.ccc.de/congress/2025/event/908d3857-0a64-48bf-8a6d-1c5e71f67195/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "en",
"description": "\"Welcome to the catacombs of Dammtor, the grandest and one of the most ancient in Hamburg. For those of you who have booked in advance please step inside. I trust you have all signed the waiver as instructed? Good. This visit will be of a long duration. Now, please hand over your tickets...”\r\n\r\nI will read to you a short horror story in which you follow a guide deep down into the intricate catacombs of Dammtor below CCH, visit the ancient sacred grounds built over centuries - and learn about a ritual only available to the most privileged...\r\n\r\nThis is not a graphic or scary story but more of a cozy \"Gruselgeschichte\", which I think will fit very nicely in the late hours after the talks.\r\n\r\n\"A Visit to the Catacombs of Dammtor\" is based on the original work \"A Visit to the Catacombs of Via Altamonvecchi\" by J. Weintraub, originally published in Karamu (vol. xx, no. 2, Spring 2007), a literary review out of Eastern Illinois University. Performed with express permission by the author.\r\n\r\nTrigger warnings (spoilers below!):\r\nIncludes mentions of claustrophobia, confinement, abandonment, religious rituals, cannibalism, injury/death, rodents",
"schedule_start": "2025-12-29T23:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T23:50:00+01:00"
},
{
"id": "f45dac95-5784-4400-b5c0-c83e2e1fca73",
"kind": "sos",
"name": "Bachmut, 19. April 2023 – Lesung und Gespräch",
"slug": "bachmut-19-april-2023-lesung-und-gesprach",
"url": "https://api.events.ccc.de/congress/2025/event/f45dac95-5784-4400-b5c0-c83e2e1fca73/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Komonin at Komona",
"language": "de",
"description": "Der 19. April 2023 war für die anarchistische und antiautoritäre Bewegung ein schwerer Schlag. Drei Aktivist\\*innen wurden an der Front in der Ukraine in einem Hinterhalt getötet: Dmitri Petrow aus Russland, Finbar Cafferkey aus Irland und Cooper Andrews aus den USA. Am 9. September wäre Dimas Geburtstag und zu diesem Anlass haben wir die Broschüre „Dmitry Petrow“, die 2023 von CrimethInc veröffentlicht wurde, ins Deutsche übersetzt, um weitere Texte ergänzt und aktualisiert. In seinem letzten Brief schrieb Cooper, dass der Krieg vermutlich nicht so schnell vorbei sein wird, und er behielt recht. Die Hoffnung auf ein baldiges Ende ist verschwunden. Die Folgen des Krieges, wenn er doch irgendwann zu Ende sein wird, die physische und psychische Zerstörung der ukrainischen Gesellschaft im Allgemeinen und der anarchistischen Bewegung im Besonderen sind unvorstellbar. Wir möchten mit euch gemeinsam an die erinnern, die nicht mehr mit uns sind. Wir werden bei dieser Veranstaltung aus dem Buch lesen, Spenden für unsere Genoss\\*innen sammeln und mit euch ins Gespräch kommen. Wir wollen die Stimmen von Dima, Finbar und Cooper hörbar machen, die eine schwerwiegende Wahl getroffen und dafür einen hohen Preis gezahlt haben. Was haben sie uns zu sagen? Was bedeutet das für uns? Und welche Schlüsse ziehen wir daraus?",
"schedule_start": "2025-12-28T12:00:00+01:00",
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},
{
"id": "c3eb0cb1-796b-43a9-a3a0-fb36c3be9dab",
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"name": "Back Gammon",
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"url": "https://api.events.ccc.de/congress/2025/event/c3eb0cb1-796b-43a9-a3a0-fb36c3be9dab/?format=api",
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"location": "Milliways",
"language": "de, en",
"description": "Eine entspannte Backgammon-Runde für alle, die zwischendurch etwas Analoges spielen möchten. Keine Vorkenntnisse nötig, keine Struktur, einfach zusammen würfeln und eine gute Zeit haben.\r\n\r\nWer ein Board hat, kann es gern mitbringen – ansonsten finden wir eine Lösung.\r\nOffen für alle, die spontan vorbeischauen wollen.",
"schedule_start": "2025-12-28T20:00:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-28T22:00:00+01:00"
},
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"name": "barking and howling session",
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"location": "between house of tea and coffee nerds",
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"description": "the successor to last years' barking and howling session! :3\r\n\r\nfeel free to come if you want to just do canine critter noises :>\r\n\r\nwoof!!",
"schedule_start": "2025-12-28T21:00:00+01:00",
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"name": "Basisworkshop Rechtswissen für Aktivismus: Versammlungsrecht, Strafrecht, Hausdurchsuchungen",
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"url": "https://api.events.ccc.de/congress/2025/event/d2001256-70c6-4330-a02f-3e57fd77c6a1/?format=api",
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"location": "next to Pixelebbe (Layer 2, G6)",
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"description": "📍 Der Ort dieser Session könnte sich ändern, bitte hier noch mal nachschauen, bevor es losgeht. **Aktuell ist als Ort der freie Platz [neben Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Ebene 2, G6) vorgesehen.** Wir werden nicht viel Platz haben, da wir natürlich keine (Flucht-)Wege belegen möchten.📍\r\n\r\nMögliche Inhalte:\r\n\r\n- Gewöhnliche Versammlungen, Eilversammlungen, Spontanversammlungen\r\n- Was ermöglicht Versammlungsfreiheit?\r\n- Wo liegen Nachteile beim Versammlungsrecht?\r\n- Post von der Polizei kommt. Was tun?\r\n- Hausfriedensbruch und Fassadenkletterei\r\n- Nötigung\r\n- ...\r\n\r\nSchwesterworkshop zu der [Session zu Selbstverteidigung vor Gericht](https://events.ccc.de/congress/2025/hub/en/event/detail/ohne-jurastudium-sich-selbst-oder-andere-vor-geric). Die beiden Sessions sind inhaltlich unabhängig voneinander, es ist möglich, die eine ohne die andere zu besuchen.\r\n\r\n**[Videos](https://chaos.quasicoherent.io/)**",
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"location": "between house of tea and coffee nerds",
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"description": "meetup for beepy creatures to beep at/with each other at the beepy time",
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"description": "We're ging to have a traditional Beer-tasting event at the FoodHackingBase.\r\nThere'll be multiple people bringing beer and as always we'll need to have people sign up as there's limited space available. We can only accomodate around 25 people.\r\n\r\n\r\nSign up HERE:\r\n[dudle](https://dud-poll.inf.tu-dresden.de/zBmKvMiCjw/)\r\n\r\nIf you are NOT normally a beer-drinker or are not fond of 'weird beers', please consider leaving the event for others to sign up to, as we have rare and weird beers that would be a shame to waste.",
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"url": "https://api.events.ccc.de/congress/2025/event/320acfbc-ca83-41bc-88e0-5cfcf4507c95/?format=api",
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"description": "(Workshop will be primarily in German and the introduction will be in German. However, most of the interaction will happen between you, your computer and maybe the person(s) next to you, so non-German-speaker should also be able to participate. I will walk around and can answer questions in English.)\r\n\r\nIn this interactive workshop, you will hunt for widespread vulnerabilities from the popular category “Broken Access Control.” In a specially designed cyber range, you will be challenged to detect and exploit security gaps and understand the dangers posed by inadequately secured access points.\r\n\r\nAfterwards, we will work together to develop solutions that will help you avoid such vulnerabilities in the future and ensure the security of your applications.\r\n\r\nTarget group: Developers (at least hobbyists) with no particular connection to IT security.\r\n\r\nTechnical requirements: You have used websites before. You can read simple code.\r\n\r\nTechnical requirements: Laptop with internet access (shared with another person if necessary). Firefox(!)-Browser (no Chrome, no Safari, no Edge).\r\n\r\nTranslated with DeepL.com (free version)",
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"name": "Beyond Keycloak - OpenSource for identity governance at large organizations",
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"url": "https://api.events.ccc.de/congress/2025/event/1d995abc-14f8-45df-b059-048a200c2fb5/?format=api",
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"description": "A small talk / success story (and discussion) about stepping up from SSO to effective IGA.\r\n\r\nI would like to share what my organization went through to have effective identity governance ahead of NIS-2 and the role of open source in this endavour.\r\nWould also love to discuss your current experiences or journeys in the IAM space!\r\n\r\nDependig on our guests, this talk may be held in German or English.\r\n\r\n// Location Hint: Shared Table 13 is at the left side of the foyer in front of hall 3. \r\n// The shared tables have little stands with yellow rockets and the table number at the center.",
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{
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"location": "Near NOC HD at the end of the Hallway to the glassfront (past kids space)",
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"description": "A meetup of BGP interested people, e.g. with datacenter projects or personal ASN etc",
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{
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"url": "https://api.events.ccc.de/congress/2025/event/b7bc89f8-680f-42cc-90b5-fd17a610e287/?format=api",
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"description": "THE Bicycle Messenger and bicycle enthusiast meetup at 39c3. Let's get to know each other and talk about bikes and #messlife.",
"schedule_start": "2025-12-30T10:30:00+01:00",
"schedule_duration": "00:25:00",
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},
{
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"name": "Binaergewitter Hörertreffen",
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"url": "https://api.events.ccc.de/congress/2025/event/539cfed8-0bed-42fc-9796-a7b60098ce0f/?format=api",
"track": null,
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"location": "In front of Hall Z, look ingo,felix,felix and markus",
"language": "de",
"description": "Meeting of the listeners of the binärgewitter podcast",
"schedule_start": "2025-12-29T15:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T15:25:00+01:00"
},
{
"id": "762c01e3-ceef-499c-b951-1c95cc188c01",
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"name": "Bio - Hacking - Science",
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"url": "https://api.events.ccc.de/congress/2025/event/762c01e3-ceef-499c-b951-1c95cc188c01/?format=api",
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"description": "The \"Bio - Hacking - Science\" assembly is a space for people interested in the intersection of biological science, computation, art, and their profound ethical and political implications. We are a community of bio nerds, scientists, hackers and artists dedicated to bridging the worlds of biology, hardware, and hacker culture. Our group serves as a welcoming hub for newcomers, amateurs, and experts alike to hang out, exchange knowledge, and discuss current and future biotechnologies and their impact on society.",
"schedule_start": "2025-12-28T15:30:00+01:00",
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},
{
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"name": "Blåhaj Gifting Circle",
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"url": "https://api.events.ccc.de/congress/2025/event/572b6661-8449-4b3b-9a50-e859ccca014f/?format=api",
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"location": "In the foyer next to fairydust. Will be holding a Blahaj",
"language": "de, en",
"description": "Getting the adoption of a blåhaj as a gift is a very cool experience. An experience that sadly isn't possible for everyone. So why not help each other?\r\n\r\nOur Idea: We collectively go to IKEA Hamburg Altona (around 25min from CCH), everyone buys one blåhaj and then gifts it to another participant. While that might sound weird, it'll probably be very funny :3\r\n\r\nIf you want to participate: Send me a DM with the Haj-Size that your planning on adopting on the Hub, on Fedi or Matrix so we know that there's enough participants for each size.",
"schedule_start": "2025-12-29T14:00:00+01:00",
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},
{
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"kind": "sos",
"name": "Blinkenlights Programmierworkshop",
"slug": "blinkenlights-programmierworkshop_8h4y",
"url": "https://api.events.ccc.de/congress/2025/event/3927fe0e-74a8-4e27-b368-8ca421c8ff9f/?format=api",
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"location": "Hackzogtum",
"language": "de, en",
"description": "A beginners workshop for programming in python.\r\nWe have small 8x8 LED-Matrizzes which can be controlled via command line with python commands. \r\nWe will begin giving simple commands just switching on/off single LEDs and define colors. Then we explore loops, alternatives and functions to build small programms for drawing on the matrix or building small animations.\r\n\r\nThe workshop is explicitly for total beginners. But everyone is welcome.\r\nRecommended age 10+\r\n\r\nWe are around till 17:00 and each odd hour new attendees are prioritized for using the workstations, and we give introductions. We are around to help the whole time. If a stations is free feel free to use it at any time. We have 5 workstations.",
"schedule_start": "2025-12-30T13:00:00+01:00",
"schedule_duration": "03:00:00",
"schedule_end": "2025-12-30T16:00:00+01:00"
},
{
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"kind": "sos",
"name": "Blinkenlights Programmierworkshop",
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"url": "https://api.events.ccc.de/congress/2025/event/7b3e2759-b0a8-4d67-b95d-0c130b5d2c10/?format=api",
"track": null,
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"location": "Hackzogtum",
"language": "de, en",
"description": "A beginners workshop for programming in python.\r\nWe have small 8x8 LED-Matrizzes which can be controlled via command line with python commands. \r\nWe will begin giving simple commands just switching on/off single LEDs and define colors. Then we explore loops, alternatives and functions to build small programms for drawing on the matrix or building small animations.\r\n\r\nThe workshop is explicitly for total beginners. But everyone is welcome.\r\nRecommended age 10+\r\n\r\nWe are around till 17:00 and each odd hour new attendees are prioritized for using the workstations, and we give introductions. We are around to help the whole time. If a stations is free feel free to use it at any time. We have 5 workstations.",
"schedule_start": "2025-12-28T11:00:00+01:00",
"schedule_duration": "06:00:00",
"schedule_end": "2025-12-28T17:00:00+01:00"
},
{
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"name": "Building a simple Transformer (Part 1) - How to make your own LLM?",
"slug": "building-a-simple-transformer-part-1-how-to-make-y",
"url": "https://api.events.ccc.de/congress/2025/event/222d4403-cd8e-475a-bb34-4215122c6f7a/?format=api",
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"location": "Stairway here https://39c3.c3nav.de/l/c:3:191.49:143.11/",
"language": "de, en",
"description": "We will learn how to train a fully-working Transformer on our laptops.\r\nUncovering how training a Next-Token-Prediction Transformer that mimics a calculator adding two numbers together works efficiently.\r\n\r\nIn the [following Part](https://events.ccc.de/congress/2025/hub/event/detail/discovering-transformer-internals-part-2-exploring). We will look into how the internals work and why our own trained models work.\r\n\r\nBring a laptop with Python and PyTorch preinstalled with you.\r\nIf you have any questions you can contact me on DECT 9560.\r\n\r\nAny updates on location and time will be written here. Also more information in the [Repository](https://github.com/DerDennisOP/39c3-transformer-workshop).\r\n\r\n**UPDATE ORT:** [Near Workshopspace 1](https://39c3.c3nav.de/l/c:3:191.49:143.11/)",
"schedule_start": "2025-12-29T17:00:00+01:00",
"schedule_duration": "01:00:00",
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},
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"name": "Building Custom Controllers to Empower Live Music Performance",
"slug": "building-custom-controllers-to-empower-live-music-",
"url": "https://api.events.ccc.de/congress/2025/event/604ebab6-445d-4c54-82ed-5dcb47aecc8b/?format=api",
"track": null,
"assembly": "sos",
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"location": "c-base, Hall H, I1-K3 (https://39c3.c3nav.de/l/c-base/)",
"language": "en, de",
"description": "These days, live electronic music performance can be achieved more easily and cheaply than ever before, while a lot more complex interactions are possible, regardless of whether the sound synthesis is digital or analogue. However, the challenge is to translate this into physical objects that allow for fast and intuitive control over the system's complexity.\r\n\r\nIn this session, Jakob and Connor will demonstrate their >2-year project of building controllers for this exact purpose: bringing their DAW-based live sets to \"life\" and empowering them to focus on the musical performance of their multi-layered techno sets without being bound by the limitations of standard hardware.\r\n\r\nAfter a short introduction and demonstration, there will be plenty of time for discussion, (nerd) talk and jamming with the hardware. Note: at 11:45 before this session, there will also be a 5-minute lightning talk on the topic at \"Ground\" by Jakob.",
"schedule_start": "2025-12-29T15:00:00+01:00",
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},
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"name": "Build your own Joustmania",
"slug": "build-your-own-joustmania",
"url": "https://api.events.ccc.de/congress/2025/event/9815a2c8-ff01-4703-8566-b40bb9b80a33/?format=api",
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"language": "de, en",
"description": "At several Chaos events, you can often spot a cheerful group of people playing the game “Joustmania” ( https://github.com/adangert/JoustMania ).\r\n\r\nIn this game, each player holds a PlayStation Move controller that tracks the player’s movement.\r\nAs soon as a controller accelerates too quickly, the player is eliminated from the game.\r\nThe competitors therefore try to defeat each other by bumping or nudging the other players’ controllers, forcing them to move too fast.\r\n\r\nThis year, I decided to rebuild the game myself and ran into quite a few obstacles along the way: from sourcing the hardware, to setting up a Raspberry Pi (the game is already about 10 years old), all the way to compiling Bluetooth drivers. In the end, this even resulted in my own fork of the project: https://github.com/VanFanelia/joustmania-remastered\r\n\r\nIn this session, I would like to share what I’ve learned, answer your questions about the game or rebuilding it, and/or organize a few rounds of play.",
"schedule_start": "2025-12-28T12:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T12:55:00+01:00"
},
{
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"kind": "sos",
"name": "Build your own mouse cursor theme (for Linux)!",
"slug": "lets-build-our-own-cursor-themes-for-linux",
"url": "https://api.events.ccc.de/congress/2025/event/475b1915-0a78-4e04-84d1-dca3ec173da1/?format=api",
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"assembly": "sos",
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"language": "en",
"description": "Since a couple of years, I've been using a custom mouse cursor theme – the cursor is a turtle emoji! Sometimes I forget that it exists, and people are amused that there's a turtle on my screen! :D\r\n\r\nIn this workshop, I'll explain how cursor themes work on Linux, and teach you how to generate your own one! It could be anything you want – some ideas:\r\n\r\n- Draw your own arrows (cool-looking? Weird ones?)\r\n- Repurpose your favorite icons/logos (so that everyone immediately knows that you're using Arch btw)\r\n- Blåhajs?!\r\n- High-contrast cursors that are actually more accessible to you\r\n\r\nBring a Linux laptop! And it'd be ideal if you could already install the vector graphics program Inkscape and the command line tool `xcursorgen`! I'll show you a little script that will help you generate the theme. If you feel comfortable with another graphics program, you can also use that instead of Inkscape.\r\n\r\nThe resulting themes work both on X.Org as well as Wayland.",
"schedule_start": "2025-12-30T11:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T11:50:00+01:00"
},
{
"id": "ea09b8bb-2c87-4802-b289-4556a83a7f1e",
"kind": "sos",
"name": "Bürgerrat zur biometrischen Authentifizierung der Zukunft - Eine spielerische Diskussion über Regulierungsansätze",
"slug": "burgerrat-zur-biometrischen-authentifizierung-der-",
"url": "https://api.events.ccc.de/congress/2025/event/ea09b8bb-2c87-4802-b289-4556a83a7f1e/?format=api",
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"description": "The year is 2040. Everyday digital life is convenient, but the digital sovereignty of state and civil society remains a sensitive issue. Recent approaches to authentication based on behavior, physical characteristics, or DNA are intended to make many things even easier – but do we want that, and if so, how? In our workshop, you will be part of a citizens' assembly deciding on the applications, implementation, and limits of these technologies. Join us in discussing the focus for tomorrow's biometrics! (This workshop will be held in German.)",
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"url": "https://api.events.ccc.de/congress/2025/event/46dd5757-308b-4b32-9c42-94c3e1fe7ec3/?format=api",
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"description": "Hygiene Training according to § 43 IfSG (German Infection Protection Act)\r\n\r\nWe are again conducting hygiene training sessions — the \"Meatball Diploma\", as it's called in German slang — for everyone involved in food preparation for others.\r\n\r\nThe goal is to raise awareness of a hygienic environment surrounding the preparation and serving of food at 39C3 and, consequently, to contribute to a higher level of healthiness of us all.\r\n\r\n\r\nIdeally, this training is preceeded initially by an instruction by the relevant public health department (Gesundheitsamt). Even better, of course, is if you have already attended \"follow-up training\", for example, at 38C3 or CCCCamp.\r\n\r\nIf you have any relevant documents, please bring them along so we can update, stamp, and sign your proof of training. :-)\r\n\r\nOf course, we also welcome everyone who is joining us for the first time without prior training from the public health department and/or without any prior knowledge of food hygiene at all.\r\n\r\n\r\nWe look forward to seeing you! - Be excellent to each other :-)\r\n\r\nTeam C3GELB (DECT 4352)",
"schedule_start": "2025-12-27T14:00:00+01:00",
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"description": "Meetup von Wesen die in Gewerkschaften sind und anderen Mitgliedern von Arbeitnehmer*innen Vertretungen.\r\n\r\nEs sind explizit alle Wesen die wollen eingeladen",
"schedule_start": "2025-12-29T22:00:00+01:00",
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},
{
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"name": "c3gsm: Ask-us-Anything about the 39c3 cellular network",
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"url": "https://api.events.ccc.de/congress/2025/event/cf194c54-396f-46ed-8f1f-907ca8094837/?format=api",
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"description": "We like to tell you how the 39c3's cellular network was created and is operated. Including the current tech stack and what changed over the last years.\r\n\r\nafterwards there will be a big Q&A session.",
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},
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"description": "A place for your TTRPG session. The whole night!\r\nFantasy to sci-fi, cosy to thrilling, rules light to rules heavy. It doesn't matter if you already played or will try it for the first time, this is the place to do it.\r\nThere will be limited materials (pens, paper). Please bring your own to ensure everyone can have some.\r\n\r\nMore information on https://c3rp.koehr.ing/",
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"url": "https://api.events.ccc.de/congress/2025/event/d05d4df0-97db-4d96-814c-b62477385957/?format=api",
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"description": "A place for your TTRPG session. The whole night!\r\nFantasy to sci-fi, cosy to thrilling, rules light to rules heavy. It doesn't matter if you already played or will try it for the first time, this is the place to do it.\r\nThere will be limited materials (pens, paper). Please bring your own to ensure everyone can have some.\r\n\r\nMore information on https://c3rp.koehr.ing/",
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"url": "https://api.events.ccc.de/congress/2025/event/77829080-31ce-4f79-9276-2266b59c6e5e/?format=api",
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"description": "Bring your analog or digital synthesizers, or other electronic audio gear!\r\n\r\nCHANGED LOCATION: We will meet around midnight at the BEAT Assembly in the c-base habitat!\r\n\r\nPlease bring\r\n- power strip!\r\n- headphones\r\n- mixer if you own one",
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"url": "https://api.events.ccc.de/congress/2025/event/bfe99110-e47c-4768-bb2d-40f930fca709/?format=api",
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"description": "Auf dem Congress gibt es viel Kunst.\r\nEs gibt Führungen, bei denen wir die Kunst gemeinsam anschauen.\r\nDie Führungen gibt es auch in leichter Sprache.\r\n\r\nEs gibt zwei verschiedene Führungen.\r\nEine heißt \"call for art\" (Aufruf für Kunst).\r\nDie zweite heißt \"art and play\" (Kunst und Spiel).\r\nBeide Führungen dauern ungefähr 1 Stunde.\r\n\r\nDie Führung \"call for art\" geht durch das ganze Gebäude.\r\nWir treffen uns für \"call for art\":\r\nam 28.12.2025, um 17.30 Uhr, am Infodesk.",
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"url": "https://api.events.ccc.de/congress/2025/event/28e3bb33-491d-47c4-9cc3-34f35237822b/?format=api",
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"description": "Lean4 is a proof assistant with an extensive mathematical library. It's also a nice programming language that can be used for formal verification of software. In this impromptu session, I can help get an opinionated Lean4 setup running on your Linux computer using Nix and Neovim. If time permits, I can show how to prove simple theorems, and answer some of the questions that might come up.\r\n\r\nSee https://github.com/kowale/39c3-careful-whispers",
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"url": "https://api.events.ccc.de/congress/2025/event/2a25bea3-6cc3-4d41-be5b-1619ec25e819/?format=api",
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"description": "The usual CCC Switzerland Gettogether, but at congress.\r\n\r\nSome organisational stuff, some meet&greet.\r\n\r\nPrimarily in German, but we can switch to English if needed.",
"schedule_start": "2025-12-30T14:30:00+01:00",
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},
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"description": "Hi 39c3, The Chaos Communication Choir is back! After a three-year break, this time we’ve got a new piece about a special bus called Adenauer, plus the classic Heaven can’t wait, which started it all back in 2017. \r\nYou can find sheet music and practice tracks here:\r\nhttps://www.ccchoir.de\r\n\r\nFor more info on the choir’s history and what we’ve been up to, check this out: \r\nhttps://fairybotorchestra.bandcamp.com\r\n\r\nOn Day 3 at 9:00 PM at Späti, everyone is invited to join in and sing—at the Punk Karaoke Special with the band Der Untergang*!",
"schedule_start": "2025-12-28T16:00:00+01:00",
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},
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"url": "https://api.events.ccc.de/congress/2025/event/6249b301-ec51-43e5-a457-f55aaef25861/?format=api",
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"description": "Hi 39c3, The Chaos Communication Choir is back! After a three-year break, this time we’ve got a new piece about a special bus called Adenauer, plus the classic Heaven can’t wait, which started it all back in 2017. You can find sheet music and practice tracks here:\r\nhttps://www.ccchoir.de\r\nFor more info on the choir’s history and what we’ve been up to, check this out: \r\nhttps://fairybotorchestra.bandcamp.com\r\n\r\nOn Day 3 at 9:00 PM at Späti, everyone is invited to join in and sing—at the Punk Karaoke Special with the band Der Untergang!",
"schedule_start": "2025-12-29T15:00:00+01:00",
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},
{
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"name": "C Code Testing. Let's talk about it!",
"slug": "c-code-testing-pass-fail-or-segfault",
"url": "https://api.events.ccc.de/congress/2025/event/dae23004-37c6-4dab-8ea8-cf4356d409c2/?format=api",
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"description": "PASS, FAIL, or SEGFAULT?\r\nI am curious how other people test their software, particularly C software.\r\n\r\nDo you test at all?\r\nHow do you do it?\r\nDo you have any hacks to prevent you from shooting yourself in the foot?\r\nLet's share your experiences!\r\n\r\nTo break the ice and get the conversation started, I will give a short talk about my journey through the testing jungle.\r\nAnd then let's have an open discussion where you can talk about your testing approach. It would be awesome if you could show us a test you wrote.\r\n\r\nEveryone is welcome, especially if you're just curious. No testing or C experience is necessary. This is a great place to ask questions and learn from the workflows of others.\r\n\r\nYou can contact me (Dominik) via email: 39C3@dominikloidolt.at\r\n\r\nSee you.\r\n\r\nFind the slides here: https://github.com/dloidolt/39c3_c_code_testing",
"schedule_start": "2025-12-27T22:00:00+01:00",
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{
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"url": "https://api.events.ccc.de/congress/2025/event/6adb1d0c-5506-4cb4-b961-f928e109ad10/?format=api",
"track": null,
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"location": "Behind the tea salon",
"language": "en, de",
"description": "Want to hide on the Congress ? Do you wanna talk about the most floofy camouflage patterns ? Looking for a combat suit for your Blahaj ? Join the Chaos Camouflage Café and bring your most nerdy combat uniform ! No worries, camouflage cloths do not necessarily have to do with military - we're just keen camo nerds !\r\n\r\nThis meeting is not military adjunct. Please be respectful with anyone prejudiced against camouflage patterns and avoid wearing cloths and suits that might trigger people.\r\n\r\n- [Statement of incompatibility](https://cryptpad.fr/doc/#/2/doc/view/rpaT+ysbVCaxZZ3+joHBpoR1Z+TnAXcQicx2mUI1og0/)\r\n- [Chat on Matrix](https://matrix.to/#/!kIQKV3x4TuGKZxvw3TNYMe14sy8CIC43qAcGF3SriZk?via=alsace.hair)\r\n\r\nBe excellent to each other !",
"schedule_start": "2025-12-28T13:12:00+01:00",
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},
{
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"name": "Chaos Cycling Club - Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/3b20319a-806c-4e5f-8b3c-8d85347016cc/?format=api",
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"location": "Entropolis",
"language": "de, en",
"description": "A meeting of cycling enthusiasts to talk about our thing™ and meet like minded people.",
"schedule_start": "2025-12-28T17:30:00+01:00",
"schedule_duration": "01:00:00",
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},
{
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"url": "https://api.events.ccc.de/congress/2025/event/d0ed382b-de48-4d79-a09e-0512fe713f61/?format=api",
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"language": "de",
"description": "THW is the civil defense agency of Germany. We will meet with people in the Chaos universe and THW to discuss topics in civil defense and disaster relief. Everyone is welcome to join us.\r\n\r\nThe session will be mainly in German. Questions and discussions can also be held in english.",
"schedule_start": "2025-12-30T10:30:00+01:00",
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{
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"name": "Chaos Kwiggle folding bike Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/ad70cbdf-19c7-4b9a-a2bb-90aa3ca9e753/?format=api",
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"location": "Fairydust / Lobby",
"language": "de, en",
"description": "The Kwiggle is the smallest folding bike in the world. It has carry-on luggage dimensions and fits in a locker. The Meetup is for Kwiggle riders who would like to share their experiences with the Kwiggle and those interested in Kwiggle who would like to do a test ride (maximum weight 90kg)",
"schedule_start": "2025-12-28T18:30:00+01:00",
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"schedule_end": "2025-12-28T19:00:00+01:00"
},
{
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"name": "Chaos prepping in case of communication collapse",
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"url": "https://api.events.ccc.de/congress/2025/event/12d73da6-9045-4af2-8fbf-004a24b616d9/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Hall 5",
"language": "de, en",
"description": "What would we do, if this would be the last congress in which we could meet freely and communicate in the known way, if a next congress somehow would not be possible this way, because of faschism, surveillance and/or other catastrophe?\r\n\r\nA brief exchange on scenarios and possible ways to deal with them.\r\n\r\n*\\[In case you have trouble finding the session, call dreieck at 3134.\\]*",
"schedule_start": "2025-12-30T14:30:00+01:00",
"schedule_duration": "00:50:00",
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},
{
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"name": "Chatbot Memory/Finetuning/Personality Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/49799351-f3bf-4821-93d7-98d005d5bd69/?format=api",
"track": null,
"assembly": "sos",
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"language": "en",
"description": "A brief meetup for those working in (private and/or decentralized and/or open-source and/or academic) LLM memory, LLM finetuning, and everything more involved than system prompts for LLMs",
"schedule_start": "2025-12-27T23:30:00+01:00",
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"schedule_end": "2025-12-27T23:55:00+01:00"
},
{
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"name": "Chatkontrolle STOPPEN!",
"slug": "chatkontrolle-stoppen_0i0p",
"url": "https://api.events.ccc.de/congress/2025/event/51371b61-851a-496c-ac29-7dff6cd18e0b/?format=api",
"track": null,
"assembly": "sos",
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"language": "de",
"description": "This workshop will take place in German. (see German version for more)\r\n\r\nFor practical information on Chat Control and an update on the current situation we recommend you attend the talk \"Chatkontrolle - Ctrl+Alt+Delete\":\r\n[https://events.ccc.de/congress/2025/hub/en/event/detail/episode-ii-der-rat-schlagt-zuruck](https://events.ccc.de/congress/2025/hub/en/event/detail/episode-ii-der-rat-schlagt-zuruck)",
"schedule_start": "2025-12-27T23:00:00+01:00",
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"schedule_end": "2025-12-27T23:50:00+01:00"
},
{
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"kind": "sos",
"name": "Collective Reading: Post-Love by Viktor Vilisov",
"slug": "collective-reading-post-love-by-viktor-vilisov",
"url": "https://api.events.ccc.de/congress/2025/event/e605c30b-e928-4e78-9312-d890190c3d71/?format=api",
"track": null,
"assembly": "sos",
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"location": "Relationship Geeks Assembly (\"Lounge\")",
"language": "en",
"description": "Abstract: Post-Love is a book that touches on everything from technology, politics and queer theory, written by the Russian author Viktor Vilisov. We will gather at the Relationship Geeks Assembly and read chapters of this book, together. Cozy discussions and collective dreaming about the future will follow. \r\n\r\nDescription: \"In Russia, as in many other places, love has definitely reached an impasse; the necropolitics of the past and present inhabit the public sphere with sacred ghosts and stifle conversation about living human bodies, the diversity of their forms and the relationships between them. The result is fewer meaningful relationships that bring joy and stability to all parties, and more violence.\"\r\n\r\nThis is how Vilisov describes their book, Post-Love. They offer a radical perspective on affect, politics and technology. At the same time, the author and their personal experiences, situate this book inside of the tumultuous present of Eastern Europe. \r\n\r\nThis book has become interesting to some of the folx who have visited the Relationship Geeks assembly at 38c9. A physical copy of the original Russian version of the book will be available for browsing at the assembly, during 39c3. The version that is being used for the collective reading is an machine-translation into English.",
"schedule_start": "2025-12-28T22:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T23:20:00+01:00"
},
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"name": "Communist meetup #1",
"slug": "is-the-free-software-communist",
"url": "https://api.events.ccc.de/congress/2025/event/70b89aae-483f-4a2b-b985-9c5978077993/?format=api",
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"description": "communist hackers, communist postartists \r\nand everyone interested in fighting fascism and imagining the world after capitalism are welcome to join our discussion.\r\n\r\nwe are bringing our local revolutionary experience from Germany, Poland, Spain and LATAM\r\n\r\nlets discuss what's need to be done:\r\n - how to setup safe digital infrastructures in your communist org\r\n - systematic changes to unshit the tech and beyond\r\n - how to quit your bullshit job and move to better system\r\n - revolutionary potential of postart (based on Jerzy Ludwiński's theory)\r\n - communist approach to free software\r\n - anti-capitalist labor scheduling based on menstrual cycle",
"schedule_start": "2025-12-30T01:00:00+01:00",
"schedule_duration": "00:50:00",
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},
{
"id": "7c19cad9-8b9c-4425-be7c-2274aad9c3c4",
"kind": "sos",
"name": "Compiler Ghost Stories",
"slug": "compiler-ghost-stories",
"url": "https://api.events.ccc.de/congress/2025/event/7c19cad9-8b9c-4425-be7c-2274aad9c3c4/?format=api",
"track": null,
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"location": "House of Tea",
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"description": "Ever had your program crash because of a bug in your compiler? Ever encountered a defect in a CPU? How do miscompilations slip into LLVM releases? Why does the Go compiler produce such weird assembly? Does Intel even know how the parts they sell work?\r\n\r\nGather around the campfire to hear about bizarre failure modes that will shake your faith in computers. :)",
"schedule_start": "2025-12-29T01:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T01:50:00+01:00"
},
{
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"kind": "sos",
"name": "Congress-Metatalk",
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"url": "https://api.events.ccc.de/congress/2025/event/97b9d779-6bdd-4e5c-9df6-453b5660f136/?format=api",
"track": null,
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"language": "de",
"description": "Wir tauschen uns ein bisschen über die Entwicklung des Congress über die Jahre aus, nicht nur aber insbesondere in Bezug auf Zugänglichkeit. Und wir können sowohl über positives als auch über negatives reden. \r\n\r\nEndlich wieder vier statt nur drei SoS-Spaces, wunderbar! Aber keine SoS mehr zwischen 02:30 und 10:30? Scheiße weil wtf, das ist ein Drittel weniger Congress, oder geil weil endlich mal Zeit wo man ohne FOMO schlafen kann? Engelküche nur noch für drei Arbeitsstunden pro Mahlzeit, fatal oder cool weil endlich das Essen reicht und die Schlangen kürzer sind? Keine Captchas mehr beim Ticketkauf. Cool weil Barrierefreiheit oder ein riesiges Problem wegen Bots? Und können wir vielleicht auch den im Fediverse kursierenden Gerüchten um verbotene Assembly-Aktivitäten auf den Grund gehen? \r\n\r\nWichtig: Das ist KEIN Feedback-Event für die Congress-Orga. Menschen von der Orga sind herzlich eingeladen dabei zu sein und Dinge als Feedback zu verstehen wenn sie wollen, aber ich organisiere das als von der Orga unabhängige Einzelperson und es geht einfach nur um einen Austausch und unterschiedliche Blickwinkel darauf, wie der Congress sich entwickelt für Menschen die sich darüber gerne austauschen würden.",
"schedule_start": "2025-12-30T14:30:00+01:00",
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"url": "https://api.events.ccc.de/congress/2025/event/f59a522c-3e62-46cd-8918-1ea415c96e09/?format=api",
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"description": "Eine weitere Verlängerung der Congress-P&P-Night. Anderer Raum als die anderen, was dran liegt, dass wir ursprünglich als zwei Menschen unabhängig voneinander eine P&P-Night angemeldet haben und das dann gemerkt und zusammen gelegt haben. Und Raum und Zeit lässt sich nicht trivial ändern, weil dieses Jahr Nacht-Sessions nur noch von der Orga angelegt werden können. Egal, wird schon, Nachts ist ja eigentlich überall genug Platz. Mehr Infos hier: https://events.ccc.de/congress/2025/hub/backoffice/self-organized/sessions/b57e7df8-1d24-458c-91a8-fcd7b281e4db/",
"schedule_start": "2025-12-29T03:00:00+01:00",
"schedule_duration": "07:00:00",
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},
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"name": "Cuddle Pile",
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"url": "https://api.events.ccc.de/congress/2025/event/d2fb0780-26f4-46ae-ba25-5fd978ef4978/?format=api",
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"location": "On the Bus in Hall H (stairs are behind the bus)",
"language": "en",
"description": "Come and cuddle",
"schedule_start": "2025-12-30T00:51:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T01:16:00+01:00"
},
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"kind": "sos",
"name": "cuddlepile meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/ed762c30-d6e3-4057-b2d9-91bf9bf082cd/?format=api",
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"location": "Near Cubetopia on a projector J7, Entrance Hall, Level 0",
"language": "en, de",
"description": "[NO LEWD PLEASE]\r\n\r\nif you need snuggles in a relatively quiet cozy area, feel free to visit!! awawawawa",
"schedule_start": "2025-12-29T22:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T23:00:00+01:00"
},
{
"id": "95f975fc-5926-4fb1-a0df-86c223c0754c",
"kind": "sos",
"name": "Cultural resistance: creating space for Palestine activism in our communities.",
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"url": "https://api.events.ccc.de/congress/2025/event/95f975fc-5926-4fb1-a0df-86c223c0754c/?format=api",
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"location": "House of Tea",
"language": "en",
"description": "Come and join us for a sharing session - we will tell you about our experience of organising cultural resistance in support of Palestine in Leipzig, and we are eager to hear from you. \r\n\r\nWe are members of Artists for Cultural Freedom Leipzig. We formed after the Euro-Scene festival succumbed to pressure from Leipzig Stadt and the Sächsisches Staatsministerium für Wissenschaft, Kultur und Tourismus to cancel a theater performance by Palestinian artist Ahmed Tobasi in 2024. Our community organised to bring the performance to Leipzig and stage it independently in 2025.\r\n\r\nhttps://www.tagesschau.de/inland/regional/sachsen/mdr-umstrittene-palaestinensische-theater-performance-kommt-in-leipzig-auf-die-buehne-100.html\r\n\r\nBring your experiences to share! We will talk about how we organise, how we keep the scope of our activities manageable, and how small wins keep us going, then hand over to you. Tell us about your community, your events, your achievements and your plans for fighting censorship and exclusion. \r\n\r\nDepending how many people come, we may split into smaller groups for ease of communication.",
"schedule_start": "2025-12-30T14:00:00+01:00",
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{
"id": "3602477b-0aa4-4963-bd8b-deee8a4a7e53",
"kind": "sos",
"name": "CyberRau㎥ is BACK! 🎉 Aramba-rtholl bday meetup!",
"slug": "cyberraum-is-back-aramba-rtholl-bday-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/3602477b-0aa4-4963-bd8b-deee8a4a7e53/?format=api",
"track": null,
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"location": "Near Art&Play-area / Uptime-Bar on Ground floor in the far corner of huge Hall H",
"language": "de, en",
"description": "The CyberRau㎥ is BACK! This year in full beauty! Drop by for a drink 🎉 Like every year Day1 is my birdthay :)) On day 2 and 3 CyberRau㎥ will roam the floors of CCH, who wants to join the team?! \r\n\r\n Look out for the cube! 🧊",
"schedule_start": "2025-12-27T21:00:00+01:00",
"schedule_duration": "03:00:00",
"schedule_end": "2025-12-28T00:00:00+01:00"
},
{
"id": "4ed8ff38-ce4b-4987-808a-213a6755e747",
"kind": "sos",
"name": "Cybersecurity Märchen – Neues aus Nerdistan",
"slug": "cybersecurity-marchen-neues-aus-nerdistan",
"url": "https://api.events.ccc.de/congress/2025/event/4ed8ff38-ce4b-4987-808a-213a6755e747/?format=api",
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"language": "de",
"description": "The reading will be held in German.\r\n\r\nI’m mitBen, and for over 25 years, I’ve been working as a Cybersecurity expert to make the world a safer place. As a speaker, I’m here today to take you on a journey where classic fairy tales like The Seven Little Goats and Puss in Boots are brought into the digital realm. In \"Cybersecurity Märchen – Neues aus Nerdistan\", I’ll teach you the fundamentals of IT security in a fun and nerdy way – all without the dry theory.\r\n\r\nImagine this: the seven little goats need to protect themselves from a hacking wolf. Puss in Boots becomes a cybersecurity pro and shows us how he defends his system with clever tricks. In these and many other stories, I’ll take you on an adventure where you’ll learn important security lessons – all wrapped up in fairy tales you’ve never heard before.\r\n\r\nWith my 25 years of experience in cybersecurity and as an experienced speaker, I will provide you with everything you need to know about digital security. It’s not just about making complex topics understandable – it’s about getting you excited for the digital world, with a pinch of humor and fantasy.\r\n\r\nI’m also working on organizing an XXL Night Session, where we can dive even deeper into the mysteries of cybersecurity. In this special extended session, you’ll get even more fairy tales, plenty of stories from last year, and expanded insights into the world of digital security – guaranteed to be thrilling and educational.\r\n\r\nMissed the session or want to have more cyber. Find the XXL session:\r\nhttps://events.ccc.de/congress/2025/hub/de/event/detail/cybersecurity-marchen-xxl-neues-und-altes-aus-nerd",
"schedule_start": "2025-12-28T21:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T22:20:00+01:00"
},
{
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"name": "Cybersecurity Märchen XXL – Neues und Altes aus Nerdistan",
"slug": "cybersecurity-marchen-xxl-neues-und-altes-aus-nerd",
"url": "https://api.events.ccc.de/congress/2025/event/aae67fd1-cf9b-4aff-aef5-ed6c14609c96/?format=api",
"track": null,
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"description": "Cybersecurity Märchen XXL – New and Old Stories from Nerdistan\r\n\r\nThis session ist held in german\r\n\r\nI’m mitBen, and with over 25 years of experience as a Cybersecurity expert, I invite you to a very special journey into the world of digital security – in an exclusive XXL Night Session. In this extended session, I will read fairy tales from last year and perhaps even some that didn’t make it into the daytime session. We’ll experience familiar tales like The Seven Little Goats and Puss in Boots in a new light, while also diving even deeper into the secrets of cybersecurity.\r\n\r\nThe XXL Night Session will take place in an abandoned room, providing the perfect atmosphere for a deeper journey through Nerdistan. This session is your chance to immerse yourself more intensively into the world of cybersecurity. With a relaxed yet thrilling vibe, it’s designed for all the night owls out there.\r\n\r\nThe day session the day before can be found here:\r\nhttps://events.ccc.de/congress/2025/hub/de/event/detail/cybersecurity-marchen-neues-aus-nerdistan",
"schedule_start": "2025-12-29T01:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T02:50:00+01:00"
},
{
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"kind": "sos",
"name": "Data Heroes - Spielerisch Daten und KI für das Gemeinwohl nutzen",
"slug": "data-heroes-spielerisch-daten-und-ki-fur-das-gemei",
"url": "https://api.events.ccc.de/congress/2025/event/4c804cda-1108-475c-993c-24a0b219518b/?format=api",
"track": null,
"assembly": "sos",
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"location": "Gesellschaft für Informatik Assembly (GI) // Halle H (Pinkes Neon-Schild)",
"language": "de",
"description": "Fancy a few rounds of “Data Heroes”? We’ll play this card game about data literacy, decision-making, and data for good. The game was developed by the Civic Data Lab, a project of the German Informatics Society (Gesellschaft für Informatik e.V.), which supports civil society organizations in using data and AI for the public good in a practical, responsible, and meaningful way. From civil society, for civil society! (The Game is in German)",
"schedule_start": "2025-12-29T14:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T15:20:00+01:00"
},
{
"id": "8faa4a5c-4ff2-4c5e-b43e-8306183d2c5a",
"kind": "sos",
"name": "DDNet Meetup",
"slug": "ddnet-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/8faa4a5c-4ff2-4c5e-b43e-8306183d2c5a/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
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"language": "en, de",
"description": "DDNet community and developer meetup. We'll showcase a new project and have time for any any DDNet related topic. All creatures welcome!",
"schedule_start": "2025-12-29T12:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T12:55:00+01:00"
},
{
"id": "221ee350-8adb-4b72-9e83-86975fdf2d07",
"kind": "sos",
"name": "DECT hacking meetup [location: hall Ground]",
"slug": "dect-hacking",
"url": "https://api.events.ccc.de/congress/2025/event/221ee350-8adb-4b72-9e83-86975fdf2d07/?format=api",
"track": null,
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"description": "[location: hall Ground]\r\n\r\nAt 38c3 we held a meetup about hacking on DECT, where we discussed subjects varying from the history of deDECTed to the new PCB designs. Let's discuss the updates since last year and possible future plans!\r\n\r\nSome info has been documented on the reDECTed wiki: https://wiki.redected.org/\r\n\r\nPossible talking points for this time:\r\n* Driver implementations for the SC14, possible pitfalls and lessons learned\r\n* OSHW PCB DECT handset(s)\r\n* Better cryptography\r\n* DECT retrofitting in rotary phone\r\n* Modern (USB?) Com-on-air alternative\r\n* DECT on conference badges\r\n* Other creative applications not yet made by traditional DECT vendors\r\n* Resurrecting the Wireshark dissector: https://wiki.wireshark.org/DECT\r\n* CR16 Linux port/QEMU target/compilers",
"schedule_start": "2025-12-29T18:00:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-29T19:30:00+01:00"
},
{
"id": "e34208c7-7884-4115-8b5c-3313919875a9",
"kind": "sos",
"name": "Demokratische Schule - Die radikalste Schulart, die es gibt",
"slug": "demokratische-schule-die-radikalste-schulart-die-e",
"url": "https://api.events.ccc.de/congress/2025/event/e34208c7-7884-4115-8b5c-3313919875a9/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
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"language": "de",
"description": "Eine Schule in der Lehrer und Schüler über sämtliche Schulregeln gleichermaßen mitentscheiden. Eine Schule in der die Schüler komplett frei sind, in dem was sie lernen?\r\nKann das funktionieren? Wie gehts den Kindern nach der Schulzeit und was heißt das für Eltern?\r\n\r\nIch bin Schulgründer einer Demokratischen Schule und präsentiere euch anschaulich mit vielen Grafiken, Videos und ein paar Studien, wie das bei uns so läuft. Im Anschluss könnt ihr mir und einem Elternteil eines Schülers Fragen stellen.",
"schedule_start": "2025-12-27T14:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-27T15:20:00+01:00"
},
{
"id": "96095f8e-2a83-4cac-869d-253beef171c6",
"kind": "sos",
"name": "Demo-LARPs / LARPs als Demo: Spiel, Spaß, Verwirrung und klare Kante im Protest",
"slug": "how-to-antifascist-protest-rave-demo",
"url": "https://api.events.ccc.de/congress/2025/event/96095f8e-2a83-4cac-869d-253beef171c6/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de, en",
"description": "We are staging a LARP (live action role play). \r\n\r\nWhat can you expect? \r\n\r\nNo rubber swords or black blocs. Instead: \r\ncamping, anti-fascism, raves, protests and music. Plus: \r\ncabaret, theatre, fun, improvised dialogue and scripted interventions. \r\n\r\nWe play together and invite you to dance along. All under the theme: \r\n\r\nDemonstrations are necessary, but we have to change them.\r\n\r\nWould you like to contribute to the lecture performance? Here is a pad link: \r\nhttps://pads.ccc.de/c39c3-demo-larp\r\n\r\nTranslated with DeepL.com (free version)",
"schedule_start": "2025-12-29T01:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T02:50:00+01:00"
},
{
"id": "90afac43-ecbe-4b10-95bf-0a8c9356d8ce",
"kind": "sos",
"name": "Den solidarischen Gutscheintausch mit Unterstützung der App Couponexpress organisieren",
"slug": "den-solidarischen-gutscheintausch-mit-unterstutzun",
"url": "https://api.events.ccc.de/congress/2025/event/90afac43-ecbe-4b10-95bf-0a8c9356d8ce/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de, en",
"description": "The initiative “No to Payment Cards Leipzig” organizes the solidarity-based voucher exchange with the help of the open source app Couponexpress. The app is freely available on codeberg.org and comes with instructions for use. The app is only used within the group to manage an ordering system for vouchers. With the help of the app, voucher orders from solidarity buyers can be matched with the vouchers actually available after an exchange, and the distribution to be made can be calculated. Without the app, the now large number of vouchers to be distributed would no longer be manageable, and it would not be possible to help so many people obtain more cash to circumvent the discriminatory payment card system.\r\n\r\nIn the SoS, the app is presented by people from the Leipzig initiative and its use is explained.",
"schedule_start": "2025-12-28T11:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T11:55:00+01:00"
},
{
"id": "b4d2ca96-a4db-4dc5-b3f0-95ad83dbb53e",
"kind": "sos",
"name": "Deri-vative",
"slug": "deri-vative",
"url": "https://api.events.ccc.de/congress/2025/event/b4d2ca96-a4db-4dc5-b3f0-95ad83dbb53e/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Kidspace, Halle B, runder Tisch",
"language": "de, en",
"description": "\"Collage is when you secretly cut up someone else’s reality to assemble your own.\"\r\n\r\nI would like to share my passion to the collage art and show you one or two exercises with paper, scissors and glue stick. I hope, it will help you to unleash your creativity and you will be fascinated with the result. =)\r\n\r\nCurrently I have paper material for 20 people, but only 5 scissors. So, if you have a pair of scissors, please bring them with you.",
"schedule_start": "2025-12-30T11:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-30T12:00:00+01:00"
},
{
"id": "d74a7404-f88b-40bc-bf80-99e4bbbf9f05",
"kind": "sos",
"name": "DFIR Meetup",
"slug": "dfir-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/d74a7404-f88b-40bc-bf80-99e4bbbf9f05/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Near Exploit Bar - https://39c3.c3nav.de/l/c:3:207.82:149.41/@3,196.87,148.77,4.99",
"language": "de, en",
"description": "Meetup for DFIR people (Digital Forensics and Incident Response). No structured agenda. Networking event and casual chat about DFIR topics.\r\nIf you have questions like: \"Which tool do you use for XYZ\", this is the right place to ask such questions and start a conversation about it.",
"schedule_start": "2025-12-28T22:00:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-29T00:00:00+01:00"
},
{
"id": "59004441-81f9-4677-8083-23cf19b4badc",
"kind": "sos",
"name": "Digitale Infrastruktur für Videos und Podcasts: WissKomm Wiki Talk, Q&A",
"slug": "digitale-infrastruktur-fur-videos-und-podcasts",
"url": "https://api.events.ccc.de/congress/2025/event/59004441-81f9-4677-8083-23cf19b4badc/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de, en",
"description": "“[Who's speaking?](https://media.ccc.de/v/gpn23-213-lanzmining-wer-spricht-denn-da-),” asked arrrrrmin at GPN23. But finding out who speaks how often on talk shows, etc., takes weeks.\r\n\r\nBut why has no one structured this flood of videos and podcasts yet? Especially now that AI slop is permeating all media, it's becoming increasingly difficult to figure out what's behind what you're hearing.\r\n\r\nIf you, like arrrrrmin, are looking for answers, the WissKomm Wiki is for you. The project has been in planning since 2021 and will officially launch in 2026 to make videos and podcasts more accessible and understandable for everyone in many workshops like this one. If you want to know more about videos and podcasts, check out the [video at C3PB](https://c3pb.de/blog/vorstellung-der-idee-des-wisskomm-wikis.html), take a look at the [project website](https://borgnetzwerk.org/wisskomm-wiki-2026), but most importantly:\r\n\r\nCome to the 39C3 talk :)\r\n\r\nWe look forward to seeing you!\r\n\r\n_The talk will be followed by a [workshop](https://events.ccc.de/congress/2025/hub/de/event/detail/digitale-infrastruktur-fur-videos-und-podcasts-wis) the next day, where we can discuss all questions and ideas in detail ;)_",
"schedule_start": "2025-12-28T13:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T13:50:00+01:00"
},
{
"id": "a3dbd469-ae20-42e6-9a10-21dc2e61e7f9",
"kind": "sos",
"name": "Digitale Infrastruktur für Videos und Podcasts: WissKomm Wiki Workshop",
"slug": "digitale-infrastruktur-fur-videos-und-podcasts-wis",
"url": "https://api.events.ccc.de/congress/2025/event/a3dbd469-ae20-42e6-9a10-21dc2e61e7f9/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": "de, en",
"description": "_This is the workshop for the [WissKomm Wiki Talk](https://events.ccc.de/congress/2025/hub/de/event/detail/digitale-infrastruktur-fur-videos-und-podcasts). Listening to the talk is helpful, but not necessary. You can also listen to the [GPN23 Talk](https://media.ccc.de/v/gpn23-299-ctrl-f-for-facts-mit-dem-wisskomm-wiki-filterblasen-erkennen-und-fakten-sichtbar-machen) or just drop by - we look forward to seeing you :)_\r\n\r\n“[Who's speaking?](https://media.ccc.de/v/gpn23-213-lanzmining-wer-spricht-denn-da-),” asked arrrrrmin at GPN23. But finding out who speaks how often on talk shows, etc., takes weeks.\r\n\r\nBut why has no one structured this flood of videos and podcasts yet? Especially now that AI slop is permeating all media, it's becoming increasingly difficult to figure out what's behind what you're hearing.\r\n\r\nIf you, like arrrrrmin, are looking for answers, the WissKomm Wiki is for you. The project has been in planning since 2021 and will officially launch in 2026 to make videos and podcasts more accessible and understandable for everyone in many workshops like this one. If you want to know more about videos and podcasts, check out the [video at C3PB](https://c3pb.de/blog/vorstellung-der-idee-des-wisskomm-wikis.html), take a look at the [project website](https://borgnetzwerk.org/wisskomm-wiki-2026), but most importantly:\r\n\r\nCome by the 39C3 workshop :)\r\n\r\nWe look forward to seeing you!",
"schedule_start": "2025-12-29T21:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T22:20:00+01:00"
},
{
"id": "7bcbf80c-bb46-4155-b9d2-d00bd23683ba",
"kind": "sos",
"name": "Direct Action wieder hipp machen",
"slug": "direct-action-wieder-hipp-machen",
"url": "https://api.events.ccc.de/congress/2025/event/7bcbf80c-bb46-4155-b9d2-d00bd23683ba/?format=api",
"track": null,
"assembly": "sos",
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"location": "pixelebbe 2 Stock",
"language": "de",
"description": "Diskussionsrunde über die einstieg Hürden von Kreativaktivismus und wie wir sie überwinden können.",
"schedule_start": "2025-12-29T19:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T19:55:00+01:00"
},
{
"id": "02db3f03-fc46-42f7-aced-5691e1d510dc",
"kind": "sos",
"name": "Discovering Transformer Internals (Part 2) - Exploring what Grokking is and how it works?",
"slug": "discovering-transformer-internals-part-2-exploring",
"url": "https://api.events.ccc.de/congress/2025/event/02db3f03-fc46-42f7-aced-5691e1d510dc/?format=api",
"track": null,
"assembly": "sos",
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"location": "Stairway here https://39c3.c3nav.de/l/c:3:191.49:143.11/",
"language": "de, en",
"description": "We will explore what happend in \"[Grokking: Generalization Beyond Overfitting on Small Algorithmic Datasets](https://arxiv.org/abs/2201.02177)\".\r\n\r\nYou can find Part 1 [here](https://events.ccc.de/congress/2025/hub/en/event/detail/building-a-simple-transformer-part-1-how-to-make-y).\r\nIf you have any questions you can contact me on DECT 9560.\r\n\r\nAny updates on location and time will be written here. Also more information in the [Repository](https://github.com/DerDennisOP/39c3-transformer-workshop).\r\n\r\n\r\n**UPDATE ORT:** [Near Workshopspace 1](https://39c3.c3nav.de/l/c:3:191.49:143.11/)",
"schedule_start": "2025-12-29T18:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T19:00:00+01:00"
},
{
"id": "19c55e7f-241d-40d3-9956-94424dde5cce",
"kind": "sos",
"name": "dn42/Freifunk multicast routing/peering workshop",
"slug": "dn42freifunk-multicast-routingpeering-workshop",
"url": "https://api.events.ccc.de/congress/2025/event/19c55e7f-241d-40d3-9956-94424dde5cce/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Bits & Bäume workshop area",
"language": "en",
"description": "Multicast allows to send information, for example audio or video streams, sensor data or service discovery messages, to many interested recipients with minimal overhead, without the need of a central, beefy server. A perfect fit with a decentral network like dn42 (https://dn42.dev/) or Freifunk (https://freifunk.net/)?\r\n\r\nThe fundamental standards for multicast aren't new but usable, \"bugfree\" implementations have been rare in the past. And multicast is typically not available on common consumer internet connections.\r\n\r\nThe former has changed though, great progress was made in OpenSource software, including Freifunk firmwares and mesh routing protocols, in recent years. Allowing us to experiment with this and potentially making it available to and from a wider, public, distributed audience and providers.\r\n\r\nTo really unfold the potential of multicast and to tackle the chicken & egg problem it will be crucial to establish a multicast topology with a wide reach. So let's start with making our hackspaces and community networks multicast interconnected!\r\n\r\n---\r\n\r\nThis session will kick off with a small presentation on IPv6 multicast routing. Followed by a practical, hands-on workshop to set up IPv6 multicast peerings based on PIM-SD (https://www.rfc-editor.org/rfc/rfc7761) over dn42. While the presented tooling will focus on bird (https://bird.network.cz/) with a dedicated BGP multicast channel + pim6sd (https://github.com/troglobit/pim6sd) experimentation and discussion on other tools (maybe FRR?) and approaches will be highly encouraged.\r\n\r\nPrerequisites: For the workshop part you should have a dn42 node or other BGP enabled router set up and connected beforehand and should have some experience with IPv6 unicast routing. Also feel free to stop by in the #dn42-multicast IRC channel on HackInt (https://hackint.org/) in advance. Having some more \"beta testers\" and potential people to onboard others during the session would be appreciated :-).\r\n\r\nIf you are a commercial ISP or research institute with potential multicast peering opportunities for our community networks then we would also be very interested to hear from you.",
"schedule_start": "2025-12-28T19:00:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-28T20:30:00+01:00"
},
{
"id": "cec4e709-c491-4744-8f18-3d337e7091fa",
"kind": "sos",
"name": "dn42 Network Operators Meetup",
"slug": "dn42-network-operators-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/cec4e709-c491-4744-8f18-3d337e7091fa/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "house of tea",
"language": "en, de",
"description": "dn42 is a large, dynamic VPN that employs Internet technologies (BGP, whois database, DNS, etc.). Participants connect to each other using network tunnels (GRE, OpenVPN, WireGuard, Tinc, IPsec) and exchange routes using the Border Gateway Protocol.\r\n\r\nLets meet and discuss our setups and maybe setup new peerings :)\r\n\r\nIf you have any ideas or topics you can add them here: https://md.chaotikum.org/fCdsqpICRT2m-uX6tNyGFA",
"schedule_start": "2025-12-27T18:00:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-27T19:30:00+01:00"
},
{
"id": "85c18fb9-4a2f-42f1-bd85-415dde3c7107",
"kind": "sos",
"name": "Do Not Try This At Home - Rope Access for Nerds",
"slug": "do-not-try-this-at-home-rope-access-for-nerds",
"url": "https://api.events.ccc.de/congress/2025/event/85c18fb9-4a2f-42f1-bd85-415dde3c7107/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Chaos Climbing Circuit",
"language": "en, de",
"description": "This is a very basic course to rope access and a full hands-on training. We will show you how to safely ascend and descend on a rather short climb, supervised by experienced people. There may be an advanced rope system rigged for people with prior knowledge or own gear. Our main focus is safety of all participants, next up is acessibility: we'll do this in two languages and can accomodate most people. Wheelchairs, vision impairments, phobias, we have done it and will handle it together.\r\n\r\nThis will be a rolling workshop, meaning that we'll be trying to be at the station as long/often as possible and you can come around at your convenience. We'll be there all congress with breaks imposed on us by people who are absolutely right.\r\n\r\nThis is in no way a comprehensible workshop, training or course. We will teach each participant according to their previous experience which mostly means basic ascending/descending techniques.",
"schedule_start": "2025-12-27T11:30:00+01:00",
"schedule_duration": "3 00:00:00",
"schedule_end": "2025-12-30T11:30:00+01:00"
},
{
"id": "2cfcd8a5-45be-4750-9a1a-952f7be58b15",
"kind": "sos",
"name": "Effizientes Finanzmanagement für alle - Über den nachhaltigen Umgang mit Geld",
"slug": "finanzmanagement-fur-alle-uber-den-nachhaltigen-um",
"url": "https://api.events.ccc.de/congress/2025/event/2cfcd8a5-45be-4750-9a1a-952f7be58b15/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "Event NOT in english language - sorry.\r\n\r\nThis is no \"how to get rich fast\" talk.\r\n\r\nThis Talk is about the HOW of efficiently handling money.\r\nI want to give you the means to decide yourself, what risks to take and what investments to make.\r\n\r\nMost of my Information is from my Economic Computer Sciences Bachelors degree (mainly the economics part)\r\nTopics will be: How to calculate investments, how to calculate (expected) interest and compound interest, how to \"sort\" your debt to efficiently pay it off.\r\n\r\nAfter my nerdy maths lecture, there will be time for questions and topics you are interested in. (Still under SoS Rule: No commercial advertising or crypto shilling)\r\n\r\nI did a similar SoS last year, this year will even be with slides.\r\n\r\nUnfortunately, this talk was neither recorded nor translated. My (german language) slides are available for now at media.sebz.eu/39C3/Finanzvortrag_39C3.pdf",
"schedule_start": "2025-12-27T22:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T22:50:00+01:00"
},
{
"id": "7354f45e-4858-4ae5-8a74-2ee357dc78d3",
"kind": "sos",
"name": "Eigentum: Was soll das?",
"slug": "eigentum-was-soll-das",
"url": "https://api.events.ccc.de/congress/2025/event/7354f45e-4858-4ae5-8a74-2ee357dc78d3/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "Vorstellung einiger klassischer Gedanken zur Eigentumstheorie, insbesondere zur Rechtfertigung von Eigentum.\r\nNach dem allgemeinen Teil kommen wir speziell auf geistiges Eigentum und Softwarerechte zu sprechen.",
"schedule_start": "2025-12-30T00:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T00:55:00+01:00"
},
{
"id": "f3c4365a-941d-4b00-b8e7-7d7985c967b6",
"kind": "sos",
"name": "Ein (fast) werbefreites Internet mit einem PiHole - Filter - Session für Anfänger",
"slug": "ein-fast-werbefreites-internet-mit-einem-pihole-fi",
"url": "https://api.events.ccc.de/congress/2025/event/f3c4365a-941d-4b00-b8e7-7d7985c967b6/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de",
"description": "In dieser Session zeigen wir, wie Ihr in weniger als 20 Minuten und Kosten für Hardware von weniger als 30 Euro einen Werbefilter bauen könnt. \r\nVorkenntnisse: keine außer allgemeine Neugier\r\nHardwareanforderungen: keine (für die Live Demo), falls Ihr mitmachen möchtet irgend ein Microcomputer mit RasPiOs oder Debian und SSH\r\n \r\nHintergrund: bei vielen Endgeräten bzw. Softwareprodukten ist es immer schwerer, Werbung und Tracking herauszufiltern (insbesondere bei Smartphones). Dort sind die Plugins wie UBlock Origin entweder nicht verfügbar oder sie gelten nur für den Browser und nicht für die Apps. Die Lösung ist, auf dem Weg in das Internet einfach eine Sperrliste zu haben, die alle Verbindungen zu Werbeanbietern blockt. Eine gängige OpenSource Lösung ist PiHole. Es braucht nur minimale Hardware. Ein Raspberry Pi für weniger als 30 Euro reicht dafür aus oder ein alter Computer, der sonst keine Aufgabe mehr hat. In der Session zeigen wir wie einfach es ist, ein PiHole aufzusetzen und in das Heimnetzwerk einzubinden. Seid gespannt auf das neue Nutzungserlebnis eines Internets (fast) ohne Werbung. Wir stellen eine Linkliste zur Verfügung. Damit könnt Ihr das Gezeigte zu Hause \"nachbauen\" könnt: http://ohok.org/pi-hole-links",
"schedule_start": "2025-12-30T12:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T12:50:00+01:00"
},
{
"id": "561d0dc5-1a45-4a5e-86d1-597a9da18ee6",
"kind": "sos",
"name": "Einführung in Waldbesetzungen – Vorstellung der Waldbesetzung im Altdorfer Wald",
"slug": "einfuhrung-in-waldbesetzungen-vorstellung-der-wald",
"url": "https://api.events.ccc.de/congress/2025/event/561d0dc5-1a45-4a5e-86d1-597a9da18ee6/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de, en",
"description": "Waldbesetzungen entstehen dort, wo Wälder trotz sich verschärfender Klimakrise weiter abgeholzt werden. Sie sind eine direkte Form, sich der Zerstörung der Profitgier des Kapitalismus in den Weg zu stellen. Gleichzeitig sind sie Utopieschmieden, an denen Menschen aus unterschiedlichen Kontexten zusammenkommen, um zu erproben, wie eine solidarische, klimagerechte Zukunft aussehen könnte.\r\n\r\nIm Altdorfer Wald (bei Ravensburg) leben wir seit Februar 2021. Wir kämpfen gegen die Zerstörung und Ausbeutung des Bodens durch einen örtlichen Kiesbaron. Der Kiesabbau ermöglicht das Bauen mit klimaschädlichem Beton und das Versiegeln von immer mehr Naturflächen.\r\nWeitere Infos:\r\nInstagram: @baumbesetzung.ravensburg\r\nalti-bleibt.de\r\n\r\n🧮",
"schedule_start": "2025-12-28T19:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T19:55:00+01:00"
},
{
"id": "1e5b6228-8820-4ce1-a556-e7014f5e773b",
"kind": "sos",
"name": "Einsatz von QGIS und QField zur Digitalen Datenerfassung im Gelände",
"slug": "einsatz-von-qgis-und-qfield-zur-digitale-datenerfa",
"url": "https://api.events.ccc.de/congress/2025/event/1e5b6228-8820-4ce1-a556-e7014f5e773b/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Treffpunkt: Chaos-Ost, Elsterhack-Assembly",
"language": "de",
"description": "Update vom 28.12.2025, nach der Session:\r\n\r\n1) Wer noch individuelle Fragen hat, kann gern an der Elsterhack-Assembly (Chaos-Zone) vorbeikommen und nach ESKA fragen.\r\n\r\n2) Wir haben einen Signal-Chat eröffnet. Wer dort dabei sein möchte:\r\n\r\nhttps://signal.group/#CjQKIGvYqqvP9DqcEBEnHSR_U6w1_D3b4DCg1gSU6LGmG0yoEhBznbrMWfOunVhRAfjqjFSE\r\n\r\n3) Unter folgendem Link findet ihr ein PDF mit einigen Hinweisen für den Einstieg in die Nutzung von QGIS (3.40). Dort gibt es auch ein Kapitel zur Verwendung von QField und der QGIS-Erweiterung QField-Sync.\r\n\r\nhttps://e.pcloud.link/publink/show?code=kZjB1NZ2ql4TUXHSRRC5qzrm6ESM5Ia7Ruy\r\n\r\n\r\n-----\r\nIch bin Botaniker, arbeite als Biotopkartierer und stelle meine Erfahrungen und den technischen Ansatz zur papierlosen bzw. vollständig digitalen Datenerfassung im Gelände vor. Ich freue mich auf Fragen und wünsche mir den Austausch über und Einblicke in andere Ansätze zur digitalen Datenerfassung. \r\nIm Hands-On-Teil zeige ich wie man mit QGIS unter Linux ein GIS-Projekt anlegt, und wie man dieses mit der QField-App auf einem Android-Tablet zur Erfassung von Biotopgeometrien oder Art-Fundpunkten auf Luftbildern (und anderen Kartengrundlagen) verwendet. Die erzeugten Daten werden von Android zurück auf den PC transferiert und im GIS-Projekt abschließend bearbeitet.\r\nIn diesem QGIS/QField-Workshop sehen wir uns gemeinsam an: \r\n- wie ein QGIS-Projekt eingerichtet wird,\r\n- wie der Datentransfer zwischen PC und Smartphone vonstatten geht,\r\n- wie QField funktioniert.\r\n\r\nFalls es wen interessiert, können wir auch noch über Biotopkartierung reden und wie es damit weitergehen könnte.",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T18:00:00+01:00"
},
{
"id": "abfac2db-901c-47b3-ad9e-d3ccd72a0fc8",
"kind": "sos",
"name": "Electronic Instruments Jam Session (read description!)",
"slug": "electronic-instruments-jam-read-description-if-int",
"url": "https://api.events.ccc.de/congress/2025/event/abfac2db-901c-47b3-ad9e-d3ccd72a0fc8/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": "de, en",
"description": "Like last year we jam (playing spontaneous/improvised music for ourselves) together in small groups. In order to avoid a high noise level in the room we are going to use Headphones. We welcome every kind of Instrument from your laptop with a midi-controller, your E-Guitar, a Microphone to your modular synthesizer. If you want to participate please read the following carefully.\r\n\r\nPlease bring the following with you if you plan to participate: (if you don't bring the stuff you may be able to borrow it)\r\n- Headphones\r\n- Extension Chord/Power Strip if your stuff needs power\r\n- Cable to send your tones to the other people. Small audio jack is the prefered method. Adapters are nice.\r\n\r\nIf you can, it is nice to bring Instruments for other people so people can participate without knowing about the jam before congress. It is probably a good Idea to write your name/a unique identifier on your stuff to avoid confusion.\r\n\r\nI have designed a PCB that lets 5 People plug in their instruments and headphones via small audio jack. Only the Headphone volume can be adjusted on the board. Unfortunately the board is still in the mail and I don't know if it works at all. For this reason it would be nice if you could bring Equipment to route peoples audio signals to Headphones. Especially Mixers Multi-Headphone-Amplifiers and Cables to connect everything together would be appreciated.\r\n\r\nMatrix Room for Coordination:\r\nhttps://app.element.io/#/room/#electronic-instruments-jam-session:kif.rocks\r\n\r\nI'm excited to see all of you :)",
"schedule_start": "2025-12-27T22:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-27T23:20:00+01:00"
},
{
"id": "79d28d9d-2051-49bd-bc8b-cd9065b70e06",
"kind": "sos",
"name": "Elektronische Patientenakte (ePA) - 13 Fragen, ob die ePA eine gute Idee ist",
"slug": "elektronische-patientenakte-13-fragen-ob-die-epa-e",
"url": "https://api.events.ccc.de/congress/2025/event/79d28d9d-2051-49bd-bc8b-cd9065b70e06/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "Wir stellen 13 Fragen dazu, ob die elektronische Patienenakte (ePA) in der vorliegenden Form eine gute Idee ist.\r\n\r\nAußerdem zeigen wir Möglichkeiten zum Widerspruch gegen die ePA: Man kann bei der Assembly von Freedom not Fear einen Widerspruch erstellen und gleich abschicken.\r\n\r\nQ&A findet an der Assembly von Freedom not Fear statt, Uhrzeiten werden noch bekanntgegeben.",
"schedule_start": "2025-12-28T13:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T13:25:00+01:00"
},
{
"id": "0992048b-f0b6-44ac-86f7-9bebb3425bed",
"kind": "sos",
"name": "Emacs Meetup",
"slug": "emacs-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/0992048b-f0b6-44ac-86f7-9bebb3425bed/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Lisp Assembly: https://events.ccc.de/congress/2025/hub/en/assembly/detail/lisp#fav_ee5043da-50fc-4539-a4d8-b7bad84bda37",
"language": null,
"description": "",
"schedule_start": "2025-12-27T17:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T17:50:00+01:00"
},
{
"id": "973409bf-4354-41a0-b41b-19a041bfc724",
"kind": "sos",
"name": "Emergente Systeme, nachhaltige Konflikte, Warum unsere IT nicht an Hacks scheitert – sondern an sich selbst",
"slug": "emergente-systeme-nachhaltige-konflikte-warum-unse",
"url": "https://api.events.ccc.de/congress/2025/event/973409bf-4354-41a0-b41b-19a041bfc724/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de",
"description": "Most IT systems fail not because someone makes a mistake.\r\nThey fail because no one understands the overall behavior.\r\n\r\nThis SOS deals with emergent system effects:\r\nsituations in which correctly built components together produce something\r\nthat no one planned, modeled, or controlled.\r\n\r\nUsing real-world examples from IT infrastructure, cloud dependencies, API designs, AI usage, update cascades, and financial and identity systems, we show\r\nhow technical decisions can create lasting stress and conflict – often without a classic attacker, without an exploit, without a clear trigger.\r\n\r\nIn line with the 39C3 motto “Power Cycles – Rethink, Reboot, Restart,” the session asks the question:\r\n\r\nWhat do we need to rethink before we restart?\r\nWhat can be rebooted – and what needs a fundamental rethink?\r\n\r\nThe term “sustainable war” is understood not in a military sense, but in a systemic sense:\r\n- as a state of permanent repurposing, \r\n- overstretching, and creeping destabilization of IT systems,\r\nwhich \r\n- drives innovation, \r\n- undermines resilience, \r\n- and generates social side effects.\r\n\r\nEspecially in times of global upheaval – geopolitical, technological, social –\r\nautonomy, dependencies, and resilience must be reevaluated.\r\nNot as buzzwords, but as concrete system properties.\r\n\r\nThe session is aimed at:\r\n- Administrators, security engineers, CISOs\r\n- Architects, technical decision-makers\r\n- People from think tanks, regulation, and technology impact assessment",
"schedule_start": "2025-12-29T23:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-30T00:20:00+01:00"
},
{
"id": "08ed4497-b959-446e-a79d-42146aceaf22",
"kind": "sos",
"name": "EndOf10 Meetup",
"slug": "endof10-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/08ed4497-b959-446e-a79d-42146aceaf22/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "https://39c3.c3nav.de/@0,86.66,148.66,5.21",
"language": "de, en",
"description": "Exchange and transfer of experience to and between all those who have already helped people install Linux or are planning to do so.\r\n\r\n- Brief presentation of the respective project\r\n- Collect and discuss possible dos and don'ts\r\n- What opportunities are there to promote the campaign and the individual spots?\r\n- If desired, how do we stay in touch?\r\n\r\n---\r\nThe session will take place at the table at the end of the groundfloor behind the round elevator",
"schedule_start": "2025-12-29T17:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T18:20:00+01:00"
},
{
"id": "a5847ebe-abc0-4962-8730-0a79cb60d754",
"kind": "sos",
"name": "Erfahrungsaustausch zu kommunalem Klimagerechtigkeitsaktivismus",
"slug": "vortrag-und-erfahrungsaustausch-zu-kommunalem-klim",
"url": "https://api.events.ccc.de/congress/2025/event/a5847ebe-abc0-4962-8730-0a79cb60d754/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de",
"description": "Wichtige Themen für kommunalen Klimagerechtigkeitsaktivismus sind unter anderem Wärmewende, Klimabildung und -kommunikation, Mobilitätswende und Energiewende. Doch wie bekommen wir diese Themen adressiert? In dieser Session sollen verschiedene Aktionsformen, Lehren und Werkzeuge vorgestellt und diskutiert werden. Das beinhaltet:\r\n\r\n- Bewertung der eigenen Kommune bei [Stadt.Land.Klima!](https://www.stadt-land-klima.de/)\r\n- Demonstrationen\r\n- Dialoge mit der Stadtverwaltung\r\n- Informationsfreiheitsanfragen\r\n- Offene Briefe an den Stadtrat\r\n- Kreative Kommunikationsformen\r\n- Mitarbeit in städtischen Beiräten\r\n- Pressemitteilungen\r\n- Selbstorganisierte Klimakonferenzen\r\n- Veröffentlichung von komplexen Dokumenten/Plänen/Stellungnahmen\r\n- Verwaltungsklagen\r\n- ...\r\n\r\nSiehe auch:\r\n[Vernetzung kommunaler Klimagerechtigkeitsgruppen](https://events.ccc.de/congress/2025/hub/en/project/detail/so/vernetzung-kommunaler-klimagerechtigkeitsgruppen)",
"schedule_start": "2025-12-28T11:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T11:50:00+01:00"
},
{
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"kind": "sos",
"name": "Erste Löterfolge mit der LED-Wäscheklammer",
"slug": "fab",
"url": "https://api.events.ccc.de/congress/2025/event/acb15b35-b89b-4702-9897-6b9aa3e06686/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Chaos macht Schule CMS",
"language": "de",
"description": "Wir löten eine LED Klammer.\r\n\r\nSchnelle erste Löterfolge mit einer Wäscheklammer und 4 bunt blinkenden LEDs",
"schedule_start": "2025-12-28T11:00:00+01:00",
"schedule_duration": "04:00:00",
"schedule_end": "2025-12-28T15:00:00+01:00"
},
{
"id": "21f24081-0093-47fa-986a-a7e017f9324d",
"kind": "sos",
"name": "Esperanto Schnupperkurs / Esperanto Lightning course",
"slug": "esperanto-schnupperkurs-esperanto-lightning-c_uzyw",
"url": "https://api.events.ccc.de/congress/2025/event/21f24081-0093-47fa-986a-a7e017f9324d/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
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"language": "en, de",
"description": "A short sneak peek course to the International language Esperanto.\r\n\r\nEsperanto is a planned language, initiated more than 130 years ago by Ludwik Lejzer Zamenhof. Nowadays it is spoken by more than 100 000 people worldwide.\r\n\r\nWe are people who for many years have been speaking Esperanto in our every day life. Its the language of our global circle of friends. As there are quite some parallelisms between the worldwide Esperanto community and the worldwide hacker scene, usually there are some Esperanto speakers attending the big Chaos events.\r\n\r\nOf course we cannot give a comprehensive course about Esperanto, but a few insights to the language and its community first hand.\r\n\r\nThe slides are available here: https://c3esperanto.github.io/kurseto/",
"schedule_start": "2025-12-29T19:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T20:20:00+01:00"
},
{
"id": "a82eb81e-a6d9-4593-b766-3dd53c2cd96e",
"kind": "sos",
"name": "Ethical Non-Monogamy (ENM) 101 – What are they talking about, and why?",
"slug": "ethical-non-monogamy-enm-101-what-are-they-talking",
"url": "https://api.events.ccc.de/congress/2025/event/a82eb81e-a6d9-4593-b766-3dd53c2cd96e/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
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"language": "en",
"description": "Ethical non-monogamy, whether its polyamory, relationship-anarchy, open relationships, solo-poly and so on are on the rise.\r\nBut understanding, what these new approaches to relationships are all about sometimes seems a little difficult because of all the lingo we use to make our conversations easier. This session gives a little look into the meaning of strange terms like polycule, compersion or metamour, easily misunderstood ideas like garden party enm vs. kitchen table enm, or acronyms like NRE. Armed with these (new?) concepts we'll also have a little Q&A where we'll try to give some insights into the realities of ENM life.",
"schedule_start": "2025-12-27T21:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T21:50:00+01:00"
},
{
"id": "1e4c6b67-a8e4-40ba-afe9-d75c10635490",
"kind": "sos",
"name": "Ethical non-monogamy is not only for millenials",
"slug": "ethical-non-monogamy-is-not-only-for-millenia_l336",
"url": "https://api.events.ccc.de/congress/2025/event/1e4c6b67-a8e4-40ba-afe9-d75c10635490/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "en",
"description": "Polyamory, Open Relationships, Relationship Anarchy and all the other types of ethical non monogamy, or ENM for short, seem to associated with the lifestyle of thirty-somethings – but that isn't really a hard rule and I, being an old white male myself, would like to learn and share a little bit about the challenges of ethical non-monogamy in a world where the norm is unethical non-monogamy a mono-normative value-system on the outside.",
"schedule_start": "2025-12-29T21:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T22:20:00+01:00"
},
{
"id": "a2903548-3fde-4c4b-8265-4ce461828684",
"kind": "sos",
"name": "European Health Data Space (EHDS)",
"slug": "ehds",
"url": "https://api.events.ccc.de/congress/2025/event/a2903548-3fde-4c4b-8265-4ce461828684/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en, de",
"description": "We will provide information about the EU regulation on the European Health Data Space (EHDS). The key provisions will come into force in 2027 and will then apply directly within all EU countries. EHDS says that all citizens will receive an electronic health record, which will be available EU-wide. Separately, all prescription data for medications will be available EU-wide. Access to pseudonymized health data will be permitted for very broadly defined research purposes. Individuals will have several opt-out possibilities available. How is civil society reacting?",
"schedule_start": "2025-12-29T21:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T22:20:00+01:00"
},
{
"id": "fa908cfb-d971-4875-b4ea-60b7cefd59a4",
"kind": "sos",
"name": "Exploring Digital Antispaces event series",
"slug": "exploring-digital-antispaces-event-series",
"url": "https://api.events.ccc.de/congress/2025/event/fa908cfb-d971-4875-b4ea-60b7cefd59a4/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Rosenpass Assembly",
"language": "en",
"description": "Exploring Digital Antispaces (EDA) is a discussion and group reflection format that looks at digital environments that no longer function like spaces in the traditional sense which is neither clearly private nor public: These environments are shaped by platforms, algorithms, and surveillance. They challenge our usual ways of understanding agency, responsibility, intimacy, and control.\r\n\r\nEDA does not proposing quick fixes or technical solutions, but creates space to observe, reflect, and make sense of these conditions together, and hopefully generate knowledge together with the community\r\n\r\nWhat will happen?\r\nA short framing input from Karolin Varner and Kai-Ti Wu on digital antispaces\r\nA moderated group discussion and collective reflection\r\nShared exploration of metaphors (space, desert, inhabitation, witnessing)\r\nCo-creating knowledge",
"schedule_start": "2025-12-29T14:30:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-29T16:00:00+01:00"
},
{
"id": "f972ba63-df58-43f6-bdbb-b0b930bed4d1",
"kind": "sos",
"name": "Fachschaften haben Infrastrukturen",
"slug": "fachschaften-haben-infrastrukturen",
"url": "https://api.events.ccc.de/congress/2025/event/f972ba63-df58-43f6-bdbb-b0b930bed4d1/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Fachschaft GAF Assembly",
"language": "de, en",
"description": "We, the Fachschaft for Math, Physics and Informatics, run our own IT-infrastructure for mail, web, etc. This SoS is for sharing experiences with other Fachschaften and other groups in an academic setting.\r\n\r\nLocation and Time may change, please check againt shortly before start time.",
"schedule_start": "2025-12-28T16:05:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T16:30:00+01:00"
},
{
"id": "df9f13bf-73b8-4e71-9aea-d264745ca285",
"kind": "sos",
"name": "FAFO: How we stopped worrying and bought an Electron Microscope",
"slug": "fafo-how-we-stopped-worrying-and-bought-an-electro",
"url": "https://api.events.ccc.de/congress/2025/event/df9f13bf-73b8-4e71-9aea-d264745ca285/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "We went on Kleinanzeigen and started a non-profit semiconductor lab.\r\n\r\nWe created a space to do the kind of research we've always wanted, but couldn't do at our local hackerspaces - either due to space constraints, or lack of structures allowing for a safe operation of a proper lab.",
"schedule_start": "2025-12-29T00:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T01:20:00+01:00"
},
{
"id": "3e5e527d-7601-4a16-886c-c4f886dd5c34",
"kind": "sos",
"name": "Fairphone Meetup (all creatures welcome)",
"slug": "repairable-device-meeting-all-creatures-welcome",
"url": "https://api.events.ccc.de/congress/2025/event/3e5e527d-7601-4a16-886c-c4f886dd5c34/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de, en",
"description": "We look forward to seeing all users, interested parties, and other beings! We ourselves are Fairphone Angels and will be bringing Fairphone 3, Fairphone 4, and Fairphone 6 along for you to look at and, of course, open up. Feel free to bring other devices too! We will be meeting in a relaxed atmosphere to exchange ideas; there is no planned program. In addition, various custom ROMs will certainly be represented. We welcome any further input! Of course, all creatures are welcome!",
"schedule_start": "2025-12-30T11:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T11:50:00+01:00"
},
{
"id": "3dd8e2f3-d272-4828-a2f3-802d88443679",
"kind": "sos",
"name": "FAQ Panel 2.0: Your Notes, Our Conversation: Unpacking Your Questions about Ethical Non-Monogamy",
"slug": "block",
"url": "https://api.events.ccc.de/congress/2025/event/3dd8e2f3-d272-4828-a2f3-802d88443679/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": "en",
"description": "Just like last congress we'll sit and chat about your submitted questions and thoughts. If you want to submit an idea or question, find the question box around one of our events, or at the Relationship Geeks assembly.",
"schedule_start": "2025-12-30T14:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T14:50:00+01:00"
},
{
"id": "1afe5704-5779-42f1-aeea-db22e033fcb3",
"kind": "sos",
"name": "F-Droid/OSS Android app developer meetup",
"slug": "f-droidoss-android-app-developer-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/1afe5704-5779-42f1-aeea-db22e033fcb3/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Nerdberg (Assembly)",
"language": "en",
"description": "As OSS Android app developer or contributors of F-Droid apps, we want to meet up and talk about our experiences and technical challenges. Furthermore, we want to elaborate on Google's upcoming “Android developer verification” requirement.",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T17:50:00+01:00"
},
{
"id": "95c20e48-a62f-4d99-bccf-67498c793f11",
"kind": "sos",
"name": "Femboy Meetup",
"slug": "femboy-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/95c20e48-a62f-4d99-bccf-67498c793f11/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "House of tea",
"language": "de, en",
"description": "A meetup for all kinds of femboys to get to know each other, exchange experiences and knowledge, or just chat a little. There are no fixed plans for how this meetup will take place, so feel free to contribute your own ideas or suggestions.\r\nPlease let me know in advance if you are interested so that I can plan the location accordingly.\r\n\r\nSee you :3\r\nYasu [they/them]\r\n\r\n#### Contact\r\nMatrix: @yasu:waldbewohner.eu\r\nDECT: 7024\r\n\r\n#### Meetingpoint\r\nWe are at the house of tea. Look out for a femboy flag, pink fox ears and a blue tail :3",
"schedule_start": "2025-12-28T14:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T14:55:00+01:00"
},
{
"id": "5812a526-027a-446e-95fb-bd6541124103",
"kind": "sos",
"name": "FeMENism?!",
"slug": "femenism",
"url": "https://api.events.ccc.de/congress/2025/event/5812a526-027a-446e-95fb-bd6541124103/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de, en",
"description": "When it comes to feminism, many men* who are generally in favor of it stay in the background: They don't want to intrude, override any woman*'s voice, doubt that they have anything to say, think they know too little to participate in the discussion.\r\nWe think that feminism is ready for the next (r)evolutionary phase, in which men are not \"allies\" but see themselves as a subject of feminism. What do you think: Time for FeMENism?\r\nIn this session we want to collect male* voices (too), create room for conversations and understand how people of all genders view this topic. All creatures welcome!",
"schedule_start": "2025-12-27T12:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T12:50:00+01:00"
},
{
"id": "93c7004c-b905-4dab-b353-6305a88687c9",
"kind": "sos",
"name": "Filmvorführung \"Von Menschen, die auf Bäume steigen\"",
"slug": "filmvorfuhrung-von-menschen-die-auf-baume-steigen",
"url": "https://api.events.ccc.de/congress/2025/event/93c7004c-b905-4dab-b353-6305a88687c9/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de, en",
"description": "The film \"Of People Who Climb Trees\" showcases how activists in Southern Germany and beyond carry out sometimes spectacular protest actions. The focus is on climate justice, as well as the consumption of resources and land.\r\n\r\nEveryone is welcome—whether you want to gain insight into the world of forest occupations, become more active, or are simply curious.\r\n\r\nAfterwards, an open discussion with climate activists will take place.\r\n\r\nEnglish subtitles are available.",
"schedule_start": "2025-12-28T00:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T01:20:00+01:00"
},
{
"id": "17b2847b-ea27-4f84-9299-b171aca841b8",
"kind": "sos",
"name": "FINDET NICHT STATT, da krank: Wie kann gute Männerarbeit gelingen? [all creatures welcome]",
"slug": "wie-kann-gute-mannerarbeit-gelingen-all-creatures-",
"url": "https://api.events.ccc.de/congress/2025/event/17b2847b-ea27-4f84-9299-b171aca841b8/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de, en",
"description": "Hallo, ich muss euch leider mitteilen, dass ich den Workshop absagen muss, da ich mir eine Erkältung eingefangen habe, und wenig Stimme und Energie habe und das gerade über meine Kapazitäten geht. Tut mir sehr Leid, hätte das gerne mit euch gemacht \r\n\r\nFür diejenigen die trotzdem vernetzt bleiben wollen, gibt es eine Signalgruppe zu konstruktiver Männerarbeit im Chaos: https://signal.group/#CjQKILTHwUeZ6z5tjh2aFLFUJqDUBZdc4RM6pQrtinvOgCnJEhB6V3OHw1wAe73YgRwRbCKG\r\n\r\nDies ist der Folgeworkshop zum vorherigen Männerkreis. Wir glauben dass es wichtig ist, dass wir Männer explizit von FLINTA* lernen, daher all creatures welcome. \r\n\r\nIn dem Workshop wollen wir uns zu folgenden Fragen ins Gespräch kommen:\r\n\r\n- Welche Erfahrungen haben wir mit Männerarbeit?\r\n- Wie holen wir uns (auch außerhalb der Bubble) ab? \r\n- Wie schaffen wir es den Bruch zu unseren Schwestern* anzuerkennen und auszuhalten ohne uns dabei zu entmündigen und zu verachten\r\n- Wie schaffen wir es unsere Schutzwalle soweit unten zu lassen, damit wir lernen können, aber trotzdem liebevoll und sorgsam mit uns umzugehen?\r\n- Wie können wir uns trotz unseres internalisiertem Leistungsanspruchs erlauben uns klein, bedürftig und unsicher zu zeigen?\r\n\r\nIch bin Timon (er) von menbracing. Wir sind eine kleine Initiative von Männern die sich inspiriert von der Arbeit von Bell Hooks, Adrienne Maree Brown, Veit Lindau und Anderen an männlicher Care-Arbeit versuchen.",
"schedule_start": "2025-12-30T09:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T10:20:00+01:00"
},
{
"id": "8ed32eef-7954-4e4e-b319-7a2b13de032c",
"kind": "sos",
"name": "Finding spyware/stalkerware by network analysis",
"slug": "finding-spywarestalkerware-by-network-analysis",
"url": "https://api.events.ccc.de/congress/2025/event/8ed32eef-7954-4e4e-b319-7a2b13de032c/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Hextivisti-Netzwerk Assembly",
"language": "en, de",
"description": "Small meetup with exchange about:\r\n- concepts\r\n- experiences/wins\r\n- tools (existing and ongoing ones)\r\n\r\nWe will meet here: Hextivisti-Netzwerk\r\nAssembly, J6, Hall 1 Cloakroom Foyer, Level 1\r\nhttps://39c3.c3nav.de/l/hextivisti-netzwerk/\r\n\r\nI hope not too many people show up and we have small nice round :)",
"schedule_start": "2025-12-29T20:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T21:30:00+01:00"
},
{
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"description": "Ask anything about Firefox, I will try to answer every question, no matter what it is about, and I'll try to do so without corporate blah blah.\r\n\r\nNo recordings, please.\r\n\r\nDisclaimer: Not an official Mozilla event, blah blah and in reality I'm actually a squirrel.\r\n\r\nAbout me: Principal Engineer and have been with Mozilla for almost 15 years.",
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"language": "en, de",
"description": "Free and Open Source Silicon (FOSSi) Meetup @ 39C3!\r\n\r\nThis meetup brings together everyone interested in free and open source silicon, FPGAs, ASICs, or hardware design in general. All experience levels are welcome!\r\n\r\nWe will meet at the Chillout Area in the Foyer of Hall 3.\r\nhttps://39c3.c3nav.de/l/c:0:156.89:158.38/",
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"description": "This workshop is for all who do not know at all or only have a vague idea what an “IP address” is. We’ll learn how the Internet works by making Internet traffic visible. This is a beginner’s workshop. If you toyed with Wireshark before, you will be bored to hell in this workshop.\r\n\r\nInvisible to the casual user, lots of computers communicate and work together to deliver the kitten videos you’re craving. In this workshop, we use the tool Wireshark (available for all operating systems) to make this communication visible. In lots of life demos, we’ll learn that the domain names we’re familiar with, like ccc.de or fridaysforfuture.de, are a thin layer around IP addresses, which are the real addresses computers use to identify themselves. We’ll uncover which hidden information your browser sends along each request, and we’ll see how easy it is to intercept traffic.\r\n\r\nThis workshop is for everybody who is interested in knowing how the Internet works, in which form computers talk to each other. Absolutely no prerequisites are required. People who are familiar with network stacks will be bored to hell.\r\n\r\nNote to the infrastructure team: In the final part of the talk, we’ll perform a standard ARP spoofing attack to intercept traffic from a volunteer and display their website login password on the projector. Of course we won’t use the congress network for this. I’ll use an hotspot of my own.\r\n\r\n**[Transcript](https://chaos.quasicoherent.io/)**",
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"location": "between house of tea and coffee nerds",
"language": "de, en",
"description": "Are you a furry or like wearing fox ears and/or a tail?\r\n\r\nWe're gathering to meetup and exchange about all things foxes! Let's laugh, make fox noises and wag our tails together!\r\n\r\n:3 everyone is welcome! Foxes and owners alike.\r\n\r\nPlease note: we are not associated with the Mozilla Meetup",
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"description": "Francophone meetup organized by Interhack, La Quadrature du Net and CHATONS. Of course you can also meet us and use English.",
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"description": "Freifunk, was soll das? Ich soll mein Internet mit anderen teilen, wozu das denn? Wie geht das überhaupt? Wer braucht heutztage noch WLAN von anderen Leuten wenn doch eh alle Mobilfunkflatrates haben? \r\n\r\nAll diese Fragen und weitere beantworten wir dir und haben sogar direkt noch freifunkfähige Router dabei, bei denen wir euch gern helfen diese für Freifunk einzurichten. Damit könnt ihr daheim direkt mitmachen.",
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"url": "https://api.events.ccc.de/congress/2025/event/97a02c3f-4130-481e-a101-345adab3f701/?format=api",
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"description": "In 1889, peace activist and pioneer of international peace work Berta von Suttner published the novel ‘Lay Down Your Arms' in what was then the Austro-Hungarian Empire. \r\n\r\nIn 1929, Erich Maria Remarque published his work ‘All Quiet on the Western Front' in Germany during the Weimar Republic. Both remain important works of anti-war literature to this day. \r\n\r\nIn 1942, Isaac Asimov wrote in ‘Runaround’ in the fictional handbook for robotics:\r\n\r\n\"1. A robot may not injure a human being or, through inaction, allow a human being to come to harm.\r\n2. A robot must obey the orders given to it by human beings except where such orders would conflict with the First Law.\r\n3. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.\"\r\n\r\nAre you familiar with any of these works? All of them? Others? What aspects of them are still relevant today? What can contemporary peace activism learn from them? Where is an update needed? What does peace activism look like when it incorporates modern machines, AI and the digital sphere? What works and initiatives do you know of that emerged after the Second World War and have had an impact on you? \r\n\r\nIn this session, I would like to invite you to join me in thinking about how we can stand up for peaceful conflict resolution and work for peace in our various professional disciplines and spheres of life in 2026+ in the face of ongoing warmongering and armament. \r\n\r\nWhat does your current peace practice look like? What examples of successful peace initiatives or anti-war art do you know? What is the current state of the transnational (and digitally connected) peace movement? And: How do we protect ourselves and others from repression and attacks by divisive forces and warmongers?\r\n\r\nFor several years now, I have been working intensively on the topic of peace and have designed a seminar on this topic this summer, from which I am happy to contribute preliminary work and insights to this session, if you are interested: https://www.udk-berlin.de/studium/studium-generale/lehrveranstaltungen-des-studium-generale/archiv-der-lehrveranstaltungen-des-studium-generale/archiv-sommersemester-2025/seminare-kulturwissenschaft-sose-2025/ peace-art-and-you-on-the-aesthetics-didactics-and-pedagogy-of-cultures-of-peace/\r\n\r\nLay Down Your Arms!\r\n\r\nTranslated with DeepL.com (free version)",
"schedule_start": "2025-12-29T12:30:00+01:00",
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"url": "https://api.events.ccc.de/congress/2025/event/59aaa281-8a5f-4910-9353-9cd2c7b23d60/?format=api",
"track": null,
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"location": "Bits & Bäume Habitat",
"language": "en",
"description": "Join this session to gain a deeper understanding of the work of the Free Software Foundation Europe (FSFE) and how the organisation empowers users to take control of technology. We will explore FSFE’s wide range of activities — from advocacy and policy work at the European level to practical initiatives such as “Public Money? Public Code!”, which promotes publicly funded software being released as Free Software. Explore how we fight for Device Neutrality and how we want to spark children's interest in coding.\r\n\r\nThe session will also highlight FSFE’s legal support efforts, community-building activities, and public awareness campaigns that help ensure technology remains accessible, transparent, and shaped by its users rather than by restrictive corporate or governmental control.",
"schedule_start": "2025-12-28T15:00:00+01:00",
"schedule_duration": "00:40:00",
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},
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"kind": "sos",
"name": "Fun facts for cookies",
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"url": "https://api.events.ccc.de/congress/2025/event/513f26ff-d9f1-4b5d-9018-6e9e94f93263/?format=api",
"track": null,
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"location": "quantum people and problems assembly desk",
"language": "de, en",
"description": "We made too many cookies.\r\n\r\nVisit our assembly and try some.\r\n\r\nWe trade cookies for fun facts.",
"schedule_start": "2025-12-28T17:30:00+01:00",
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},
{
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"name": "Future invaders card game session",
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"url": "https://api.events.ccc.de/congress/2025/event/2ac313f8-9fec-4f98-8864-de711e717fe0/?format=api",
"track": null,
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"location": "Milliways",
"language": "en",
"description": "Join this session to playtest Future Invaders, a sci-fi tactical card game (in the style of magic the gathering). Anyone interested is free to join! If you wish to learn the rules beforehand you can find them here https://futureinvaders.com/guides/rules . You do not need any tools or equipment to play. We will meet at milliways under the sign at the ropes. For contact you can call me on 4084 or @pitastrudl on most platforms.",
"schedule_start": "2025-12-28T23:59:00+01:00",
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"schedule_end": "2025-12-29T01:59:00+01:00"
},
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"name": "Gegen KI Kameraüberwachung am Hamburger Hansaplatz und überall",
"slug": "gegen-ki-kamerauberwachung-am-hamburger-hansaplatz",
"url": "https://api.events.ccc.de/congress/2025/event/6da7f1b2-5d19-4455-b336-e7d18446be94/?format=api",
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"location": "Hall D, or outside D",
"language": "de, en",
"description": "Brief presentation of the Hansaplatz Coalition Against AI Camera Surveillance and overview and history of the technical and legal means used the local city government to gentrify neighborhoods and repress and expel undesired populations.\r\n\r\nbuendnis-hansaplatz@posteo.de\r\n@buendnis_hansaplatz\r\n\r\n20\" Talk, 60\" Q&A\r\n\r\nNo video!",
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},
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"name": "Gemeinsam die Welt ein bisschen Bunter machen",
"slug": "gemeinsam-die-welt-ein-bisschen-bunter-machen",
"url": "https://api.events.ccc.de/congress/2025/event/7c5b50e2-285a-4656-9492-179ec3652fb5/?format=api",
"track": null,
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"location": "Saal 3, Shared Tabel 2",
"language": "de, en",
"description": "Wir stellen aus Pflanzen Farben her und malen damit.\r\n\r\nMit Milchkartons versuchen wir uns an Tiefdruck",
"schedule_start": "2025-12-28T16:00:00+01:00",
"schedule_duration": "00:45:00",
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},
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"kind": "sos",
"name": "Geocaching Meet Up",
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"url": "https://api.events.ccc.de/congress/2025/event/64e8fdad-6247-415a-baf3-8bb357141d86/?format=api",
"track": null,
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"location": "53.567814, 9.981967",
"language": "de, en",
"description": "As in the last two years, there will be a small geocaching event again this year for anyone who enjoys searching for Tupperware containers in the forest and having fun with the device (or at the Congress).\r\nThe event has the geocode GCBFG3W and can be found on geocaching.com here: https://coord.info/GCBFG3W\r\n\r\nThe event will take place on Day 2 at 11:00 a.m. at Allende-Platz in the Grindelviertel disctrict (approx. 15 minutes walk from the CCH).",
"schedule_start": "2025-12-28T11:00:00+01:00",
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},
{
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"kind": "sos",
"name": "Geo(rg)ism Meetup",
"slug": "georgism-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/07c389b0-554e-432e-9cd0-669efeafea63/?format=api",
"track": null,
"assembly": "sos",
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"location": "https://39c3.c3nav.de/l/c:0:158.47:156.36",
"language": "de, en",
"description": "If you're wondering what it's all about, watch these videos for motivation and\r\nexplanations:\r\n- TheIU.org - Land and Economic Rent (8:18)\r\n https://www.youtube.com/watch?v=0yltJHY6g5I\r\n- The Best Idea That Will Never Happen: Georgism 101 (19:52)\r\n https://www.youtube.com/watch?v=smi_iIoKybg\r\n\r\nIf you are interested in the above topics, even if they are new to you, you are\r\nwelcome to join us.\r\n\r\nLast but not least, we will certainly find space to express any frustrations\r\nrelated to Georgism, such as the lack of recognition of the positive effects of\r\npolicies like land value taxation. :)",
"schedule_start": "2025-12-29T17:00:00+01:00",
"schedule_duration": "01:00:00",
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},
{
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"kind": "sos",
"name": "Get to know the furry fandom (Q&A)",
"slug": "get-to-know-the-furry-fandom-qa_ytje",
"url": "https://api.events.ccc.de/congress/2025/event/d02ef5fa-b519-498d-8dee-316f7c91ad79/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de, en",
"description": "Ask your questions and learn about the furry fandom! Maybe you are curious and are interested in becoming a furry yourself? Or you just wonder why there are fluffy creatures at the congress? Then get to know us!",
"schedule_start": "2025-12-28T19:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T19:55:00+01:00"
},
{
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"kind": "sos",
"name": "Gewaltfreie Kommunikation",
"slug": "gewaltfreie-kommunikation",
"url": "https://api.events.ccc.de/congress/2025/event/7da06233-af37-499f-9f15-6df8d3c0d338/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "In diesem Workshop lernst du die Grundlagen der Gewaltfreien Kommunikation (GFK) nach Marshall Rosenberg kennen. Du erfährst, wie du deine eigenen Bedürfnisse klar ausdrückst, die Bedürfnisse anderer verstehst und Konflikte konstruktiv lösen kannst.\r\n\r\nMit praxisnahen Übungen und Werkzeugen trainierst du, empathisch zuzuhören, Missverständnisse zu vermeiden und Beziehungen – beruflich wie privat – nachhaltig zu verbessern.",
"schedule_start": "2025-12-27T15:30:00+01:00",
"schedule_duration": "00:50:00",
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},
{
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"kind": "sos",
"name": "GI Meet-up",
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"url": "https://api.events.ccc.de/congress/2025/event/66fb7a56-931b-4ed9-8265-193a9d2acff2/?format=api",
"track": null,
"assembly": "sos",
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"location": null,
"language": "de",
"description": "Hey, you're here too?\r\n\r\nWe are organising an informal meet-up for GI members, friends and anyone interested in the field of chaos.\r\n\r\nThe German Informatics Society (GI) is a network of computer scientists committed to digitalisation that works for everyone. With more than 17,000 individual and 250 corporate members (from academia, business, administration and civil society), it is the largest professional association for computer science in the German-speaking world and has been representing the interests of computer scientists since 1969. With 14 specialist areas, over 30 active regional groups and countless specialist groups, the GI is a platform and mouthpiece for all disciplines in computer science. GI members drive the discipline forward, ask crucial questions and constantly provide new impetus. For computer science that is oriented towards the common good, inclusive and forward-looking.",
"schedule_start": "2025-12-27T20:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T21:20:00+01:00"
},
{
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"kind": "sos",
"name": "git-annex workshop",
"slug": "git-annex-workshop",
"url": "https://api.events.ccc.de/congress/2025/event/d9efd9bf-6966-433e-ba64-e31e281d838d/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
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"language": "de, en",
"description": "Ever wanted to have proper version control but for all of your files, not just plain-text? Sounds crazy but git-annex makes it possible.\r\n\r\nIf you're already a user or just curious about the tool, come by and have a chat! :)\r\n\r\n- Get introductions, tips and tricks\r\n- Bring your issues and solutions\r\n- Show off cool things you do/did using git-annex\r\n\r\nThose who are not (yet) users are also welcome and can get introductions and explanations. It's assumed you are already comfortable with using git and the CLI in general though.\r\n\r\nThere is no fixed schedule or agenda. The primary purpose is to share our love for this amazing tool :)\r\n\r\nhttps://git-annex.branchable.com/",
"schedule_start": "2025-12-30T00:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T00:55:00+01:00"
},
{
"id": "f35beb01-d8c7-4909-9bf3-257748244fb0",
"kind": "sos",
"name": "Glasfaser-Spleißworkshop",
"slug": "glasfaser-spleiworkshop_q97v",
"url": "https://api.events.ccc.de/congress/2025/event/f35beb01-d8c7-4909-9bf3-257748244fb0/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Selfnet e.V. Assembly",
"language": "de, en",
"description": "Splicing is the process to connect fiber ends of a fiber optic cables. With single-mode glass fibers, the core diameter of the actual glass fiber is 9µm, which is smaller than a human hair.\r\n\r\nFirst you will receive a short general introduction of how a splice works, what is important and what else happens around it. Then you can try fiber optic splicing yourself. We will also measure the splice's performance using a bit error rate tester (BERT). You don't have to sign up, just come by. You should have a basic interest in the topic, a little patience and a steady hand.\r\n\r\nFurther time slots will be added shortly!",
"schedule_start": "2025-12-28T18:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T19:00:00+01:00"
},
{
"id": "65683b1e-74c3-4db5-a7e5-6b5865f25642",
"kind": "sos",
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"slug": "glasfaser-spleiworkshop_8tc6",
"url": "https://api.events.ccc.de/congress/2025/event/65683b1e-74c3-4db5-a7e5-6b5865f25642/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Selfnet e.V. Assembly",
"language": "de, en",
"description": "Splicing is the process to connect fiber ends of a fiber optic cables. With single-mode glass fibers, the core diameter of the actual glass fiber is 9µm, which is smaller than a human hair.\r\n\r\nFirst you will receive a short general introduction of how a splice works, what is important and what else happens around it. Then you can try fiber optic splicing yourself. We will also measure the splice's performance using a bit error rate tester (BERT). You don't have to sign up, just come by. You should have a basic interest in the topic, a little patience and a steady hand.\r\n\r\nFurther time slots will be added shortly!",
"schedule_start": "2025-12-29T22:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T22:25:00+01:00"
},
{
"id": "af615fc7-fe2f-4c30-a3c4-59a02d7741a0",
"kind": "sos",
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"slug": "glasfaser-spleiworkshop",
"url": "https://api.events.ccc.de/congress/2025/event/af615fc7-fe2f-4c30-a3c4-59a02d7741a0/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Selfnet e.V. Assembly",
"language": "de, en",
"description": "Splicing is the process to connect fiber ends of a fiber optic cables. With single-mode glass fibers, the core diameter of the actual glass fiber is 9µm, which is smaller than a human hair.\r\n\r\nFirst you will receive a short general introduction of how a splice works, what is important and what else happens around it. Then you can try fiber optic splicing yourself. We will also measure the splice's performance using a bit error rate tester (BERT). You don't have to sign up, just come by. You should have a basic interest in the topic, a little patience and a steady hand.\r\n\r\nFurther time slots will be added shortly!",
"schedule_start": "2025-12-27T22:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-27T23:00:00+01:00"
},
{
"id": "a6c0f5bf-c5a9-4218-b97c-a3944985af5d",
"kind": "sos",
"name": "Glegle Meetup",
"slug": "glegle-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/a6c0f5bf-c5a9-4218-b97c-a3944985af5d/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Halle G(gleh)",
"language": "en",
"description": "",
"schedule_start": "2025-12-29T19:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T19:25:00+01:00"
},
{
"id": "e5589921-4f96-4070-a988-82b8de308e48",
"kind": "sos",
"name": "Hacking Edge-AI",
"slug": "hacking-edge-ai",
"url": "https://api.events.ccc.de/congress/2025/event/e5589921-4f96-4070-a988-82b8de308e48/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "en",
"description": "AI is moving from the Cloud to the Edge. Seeing the impossibility of scaling transformers on GPU clusters and the wild amount of cash flowing to anything that can be called AI. Now using a variety of specialised and exotic hardware companies are applying AI at our doorsteps, telephone masts, street lights. \r\n\r\nCompanies like Flock Safety apply AI at the edge in their cameras they claim for efficiency and privacy. Yet, they now fail on both counts. \r\n\r\nNow that AI is breaking out of the climate controlled data centres. Will it become more smash-able, controllable? Can we prefigure convivial visions of AI? Or, will we see the next round of datafication of the enclosure? What is the Internet of Battlefield Things and how can we fight it?\r\n\r\nI plan to show some Edge-AI boards and applications. And hope for some help in attempting to find out its limits and vulnerabilities.",
"schedule_start": "2025-12-29T19:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T20:20:00+01:00"
},
{
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"kind": "sos",
"name": "Hacking Fusion: better Hot-Fusion Technologies that you have not heard about",
"slug": "fusion-geht-besser-andere-hot-fusion-technologien-",
"url": "https://api.events.ccc.de/congress/2025/event/48cc8b77-47ac-42f3-a851-0070c245e097/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en",
"description": "Fusion is always 30 years in the future because government projects are too big, too expensive, and too slow. It doesn't have to be this way. \r\n\r\nThere are better approaches than the three known research directions. There are better fusion fuels that don't cause radioactive contamination. Fusion has even been achieved by school classes and private individuals. A proof that it is possible with much less effort. \r\n\r\nIf we invested as much money in proton-boron fusion as we do in deuterium-tritium, we would probably have power plants in 15 years. Dense Plasma Focus is suitable for decentralized 10-MW power plants. Inertial Electrostatic Confinement for neighborhood power plants with 100 MW. This is not about cold fusion. It's about fusing atomic nuclei with high energy (hot) to gain even more energy. But in different physical configurations. Unfortunately, the media ignores these other hot fusion approaches. \r\n\r\nThis is an info dump on the state of the art: what fusion fuels exist, how you build your own fusion reactor, why hot plasma is physically unfavorable, why some people want to strip-mine the moon, and why other fusion projects that must make do with 100 times less money still achieve similar performance. These projects don't appear in the mainstream press. But they will soon overtake ITER. \r\n\r\n\r\nIf we want to achieve the energy transition, then policymakers must stop investing in supposedly safe large-scale technology. It could be much faster and cheaper and the new energy grid could be decentralized.",
"schedule_start": "2025-12-28T13:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T14:20:00+01:00"
},
{
"id": "1429aaa5-f089-4d97-82d9-311687ac9390",
"kind": "sos",
"name": "hacking medical research - bonus round",
"slug": "hacking-medical-research-bonus-round",
"url": "https://api.events.ccc.de/congress/2025/event/1429aaa5-f089-4d97-82d9-311687ac9390/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en, de",
"description": "Due to popular demand I'll return. Not sure if i have a structured programm, but there will be a space for questions and connecting.\r\n\r\nsee [https://events.ccc.de/congress/2025/hub/event/detail/hacking-medical-research-for-a-better-transition](https://events.ccc.de/congress/2025/hub/event/detail/hacking-medical-research-for-a-better-transition) for details",
"schedule_start": "2025-12-28T01:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T01:50:00+01:00"
},
{
"id": "dfa6ea5f-5da5-43a8-b66e-82af906f274d",
"kind": "sos",
"name": "hacking medical research for a better transition -- war stories from the backrooms of estrannai.se & co",
"slug": "hacking-medical-research-for-a-better-transition",
"url": "https://api.events.ccc.de/congress/2025/event/dfa6ea5f-5da5-43a8-b66e-82af906f274d/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en",
"description": "While medical institutions struggle to fill trans people's needs for a medical transition, an increasing number of trans people resort to managing their hormonal transition on their own. Alongside this, the DIY community has amassed a large amount of both theoretical and applied medical knowledge, matching and sometimes even surpassing researchers in the field.\r\n\r\nIn this talk, I will point out what's right and wrong with institutionalized trans research, give insights into the DIY communities' pragmatic approach to community healthcare and show what we're doing to turn lay expertise and even anecdotes into evidence-based medical research -- all without a doctor involved. \"all creatures welcome\" -- all necessary science-prerequisites are included along the way.\r\n\r\n---\r\n\r\nIf you enjoyed this talk (or not), or if you missed it (or not) -- I will do a speedrun attempt of presenting the same material in under 4.5 minutes on Day 4:\r\n[https://events.ccc.de/congress/2025/hub/en/event/detail/speedrun-hacking-medical-research-in-under-45-minu](https://events.ccc.de/congress/2025/hub/en/event/detail/speedrun-hacking-medical-research-in-under-45-minu)",
"schedule_start": "2025-12-27T21:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T21:55:00+01:00"
},
{
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"kind": "sos",
"name": "Hackspace Entwicklung einer App für die Dezentralisierung von Gutscheintauschangeboten",
"slug": "hackspace-entwicklung-einer-app-fur-die-dezentrali",
"url": "https://api.events.ccc.de/congress/2025/event/6498d7ff-4b59-4eaf-98a4-a985feab3515/?format=api",
"track": null,
"assembly": "sos",
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"language": "de, en",
"description": "In Leipzig, the initiative Nein zur Bezahlkarte (“No to the Payment Card”) has been organizing a solidarity-based voucher exchange for over a year to circumvent the harassment and discrimination of asylum seekers caused by the payment card system. The voucher exchange has now reached a scale that presents us with organizational challenges:\r\n1.\tTo organize the exchange as coordinately as possible—and thus as fairly and stress-free as possible for everyone interested in exchanging—we work with a registration system. This requires a great deal of communication, which currently takes place via WhatsApp. As demand and thus the number of requests continue to grow, the communication effort can hardly be managed in this way any longer.\r\n2.\tWe constantly need more money to meet the growing demand. This leads to an ever-increasing cash reserve that must be managed by the initiative. We therefore want to decentralize our offering—and with it the cash reserve—and empower more small groups and initiatives to create decentralized exchange offers that are nevertheless coordinated with each other.\r\nTo this end, we have developed an app idea intended to serve as a platform where exchange offers created in a decentralized manner can be posted, and which people with payment cards who want to exchange vouchers for cash can access in a low-hierarchy way to search for an exchange offer. The app is intended to be available nationwide for the dozens of exchange initiatives. In this way, it aims to help ensure that the voucher exchange—emerging in many places from spontaneous solidarity-based practice—can remain possible in the long term, as long as the discriminatory practice of payment cards is not abolished by federal legislation.\r\nWe have developed a basic structure for the app, which is to be implemented by two developers next year. At the SoS, we would like to invite people to a hackspace in order to present the development of the app and reach out to more people with coding skills, and to motivate them to support the work.",
"schedule_start": "2025-12-29T13:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T13:55:00+01:00"
},
{
"id": "0b9c0d94-d075-4689-8ff5-e40a640a6d97",
"kind": "sos",
"name": "Hack Your Brain Part 1",
"slug": "hack-your-brain-part-1",
"url": "https://api.events.ccc.de/congress/2025/event/0b9c0d94-d075-4689-8ff5-e40a640a6d97/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "Wie funktioniert dein Gehirn wirklich – und wie kannst du es gezielt steuern?\r\n\r\nIn diesem Talk erfährst du, wie dein Nervensystem und dein Gehirn aufgebaut sind, wie du Stress wirksam regulierst und wie Schlaf deine mentale Leistungsfähigkeit, Emotionen und Gesundheit bestimmt. \r\n\r\nZusätzlich erhältst du konkrete neurobiologisch fundierte Tools zur direkten Anwendung im Alltag.\r\n\r\nFür alle, die ihr Gehirn nicht dem Zufall überlassen wollen.",
"schedule_start": "2025-12-27T11:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-27T12:20:00+01:00"
},
{
"id": "438ef49e-21f8-4f13-8607-27ef6612ef23",
"kind": "sos",
"name": "Hack Your Brain Part 2",
"slug": "hack-your-brain-part-2",
"url": "https://api.events.ccc.de/congress/2025/event/438ef49e-21f8-4f13-8607-27ef6612ef23/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "Warum fällt es uns schwer, konzentriert zu bleiben – und wie lässt sich Aufmerksamkeit gezielt trainieren?\r\n\r\nIn diesem zweiten Teil geht es um die neurobiologischen Grundlagen von Fokus, Aufmerksamkeit und Lernen. Du erfährst, wie dein Gehirn Informationen auswählt, speichert und langfristig verfügbar macht – und warum Ablenkung, Multitasking und Reizüberflutung diese Prozesse messbar beeinträchtigen.\r\n\r\nZusätzlich erhältst du konkrete, wissenschaftlich fundierte Werkzeuge zur Verbesserung von Konzentration, Lernfähigkeit und mentaler Klarheit im Alltag.",
"schedule_start": "2025-12-27T12:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-27T13:50:00+01:00"
},
{
"id": "9f3c6b6e-a8c2-4777-93d7-881eb0077525",
"kind": "sos",
"name": "Hack Your Mobility Meetup — Bikesharing ohne Barrieren",
"slug": "hack-your-mobility-meetup-bikesharing-ohne-ba_z971",
"url": "https://api.events.ccc.de/congress/2025/event/9f3c6b6e-a8c2-4777-93d7-881eb0077525/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Kellerkinder Assembly Table (Location wird eventuell nochmal geändert)",
"language": "de, en",
"description": "esel.ac Bikesharing e.V. ist ein studentisch organisiertes, kostenloses Fahrradsharing-System aus Aachen, bei dem gespendete und gebrauchte Räder wieder fit gemacht und über eine eigene Plattform zur freien Nutzung bereitgestellt werden. Unsere Mission: nachhaltige, kostenlose Mobilität für alle, ganz ohne Anmeldung, Bezahlschranken oder Überwachung. Im Meetup wollen wir offen darüber sprechen, was bei selbstgebauten Sharing-Systemen gut funktioniert, wo es knirscht und wie sich Community-Ansätze zu bestehenden kommerziellen Angeboten verhalten. Themen können sein: Technik-Stack, Governance und Haftung, Umgang mit Diebstählen, sowie die Frage, wie offene und kommerzielle Systeme koexistieren oder voneinander lernen können. Das Meetup richtet sich an alle, die eigene Sharing-Projekte planen, bestehende Systeme hacken/verbessern wollen oder aus der Perspektive kommerzieller Anbieter und Kommunen mitdiskutieren möchten und alle anderen, die Interesse an dem Thema haben. ",
"schedule_start": "2025-12-27T13:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-27T14:00:00+01:00"
},
{
"id": "628aa171-5e9a-4e21-ad38-e79e8f3d3b6c",
"kind": "sos",
"name": "Häkelworkshop",
"slug": "hakelworkshop",
"url": "https://api.events.ccc.de/congress/2025/event/628aa171-5e9a-4e21-ad38-e79e8f3d3b6c/?format=api",
"track": null,
"assembly": "sos",
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"location": "Shared Table 5: https://39c3.c3nav.de/l/shared-table-5/@2,209.8,187.67,6",
"language": "de, en",
"description": "We've brought yarn, crochet needles and a few patterns, for example for a small penguin, octopus or a duck.\r\n\r\nYou can also come if you have not crocheted before, but you may not finish the project during the workshop. You can continue to work on it afterwards. The materials can also be found at the [crochet corner at Hacksaar](https://39c3.c3nav.de/l/hacksaar/). You may also bring your own project.",
"schedule_start": "2025-12-28T17:30:00+01:00",
"schedule_duration": "02:30:00",
"schedule_end": "2025-12-28T20:00:00+01:00"
},
{
"id": "5ea690bc-6a9b-405e-ad0a-dc5e0df0a180",
"kind": "sos",
"name": "Hello Qubitty! Your First Steps on a Quantum Computer",
"slug": "hello-qubitty-your-first-steps-on-a-quantum-comput",
"url": "https://api.events.ccc.de/congress/2025/event/5ea690bc-6a9b-405e-ad0a-dc5e0df0a180/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "en",
"description": "In this workshop, we will program a gate-based quantum computer provided by IBM. After a short introduction to quantum physics (only the stuff we need for programming), we’ll jump right in:\r\n\r\nWe will program three small examples on IBM’s freely accessible Quantum platform, illustrating both the limitations and the potential of quantum computers.\r\n\r\nThe workshop is suitable for absolute beginners — no prior knowledge of any programming language is required.\r\n\r\nAfter the workshop, you will have a solid understanding of how such a machine works - and whether we really need to start worrying about Q-Day already.\r\nPlease bring your laptop. You can sign up for IBM Quantum in advance (https://quantum.cloud.ibm.com/) but it’s also possible to participate without an account using the quantum simulator.",
"schedule_start": "2025-12-28T22:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T23:50:00+01:00"
},
{
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"kind": "sos",
"name": "Hold my passkey! The passwordless future (not) happening",
"slug": "hold-my-passkey-the-passwordless-future-not-happen",
"url": "https://api.events.ccc.de/congress/2025/event/9fd15cab-c9bd-44a9-8b00-99503380ada4/?format=api",
"track": null,
"assembly": "sos",
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"location": null,
"language": "en",
"description": "We all struggle with lots of passwords, often forgotten, reused or leaked. Passkeys promise to free us from both the hassle and the breaches. But will they solve authentication, or are they failed by design? A deep‑dive into convenience, control, and everything between.\r\n\r\nPasskeys are designed to replace passwords. All you need is your phone or hardware token, meaning you have to remember only one password at most. But isn't that the promise of password managers? Although they fulfil a similar role, password managers usually use classic passwords, making them seem like an interim solution on the way to more secure authentication. Wouldn't it be great to get rid of passwords once and for all and switch to passkeys?\r\n\r\nWhile passkeys promise a passwordless future, the reality is far more complex. User reluctance, questionable usability and corporate interests are making the case for passkeys increasingly difficult. So let's delve into whether passkeys do make sense from the perspective of both professional and regular users.\r\n\r\nThis talk is not a technical deep dive into passkeys, but rather addresses the issues of IT management & IAM and whether secure \"passwordless\" auth can work in the real world. The aim is not to give a bureaucratic or opinionated talk, but to open a discussion about enshittification and whether auth (doesn't) work(s) for both regular and pro users.",
"schedule_start": "2025-12-28T01:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T01:55:00+01:00"
},
{
"id": "604a28a9-3d16-4687-b507-14f9910c52a7",
"kind": "sos",
"name": "How does VC funding work, actually?",
"slug": "how-does-vc-funding-actually-work-actually",
"url": "https://api.events.ccc.de/congress/2025/event/604a28a9-3d16-4687-b507-14f9910c52a7/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
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"language": "en",
"description": "You probably have heard of \"Venture Capital\" - the mysterious infinite source of money that powers the startups of Sillicon Valley (and beyond), that powers the \"AI revolution\" and \"crypto revolution.\" You even might have heard names like YCombinator and a16z, or terms like \"Unicorn\", \"PMF\" and \"TAM\".\r\n\r\nBut where does that money come from? How can you get it? And why do people continue to give money to startups, despite 90% of them returning 0 money?\r\n\r\nEven among IT nerds, VC is often seen as something vague and mysterious - despite it shaping the world of technology since the early 2000s. Some people get money, some don't - with little rhyme or reason.\r\n\r\nThis is a small talk of someone who actively participated in the VC ecosystem. The primary goal isn't to bash or praise that industry (though it deserves a lot of bashing), but to shine a light on how it works under the hood.\r\n\r\nNote: this is an adapted version of a short lecture I gave at the Mega-Knowledgecamp (Hacksaar 2025)",
"schedule_start": "2025-12-28T00:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T01:20:00+01:00"
},
{
"id": "627c494f-3266-442c-8bcb-b485eb2d97ec",
"kind": "sos",
"name": "How the strange parallel universes of quantum mechanics conspire to enable quantum computing and that light travels in straight lines",
"slug": "how-the-strange-parallel-universes-of-quantum-mech",
"url": "https://api.events.ccc.de/congress/2025/event/627c494f-3266-442c-8bcb-b485eb2d97ec/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "next to Pixelebbe (Layer 2, G6)",
"language": "en",
"description": "📍 The location of this session might change, please check here again before the session starts. **The location is currently set to be [next to Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Layer 2, G6, 50 meters from the entrance escalator, near the blue CCH sign \"Parkett links, Seitenrang links\").** We will sit on the floor and won't have much space because we don't want to obstruct escape routes.📍\r\n\r\nSuperhero movies have taught a broad audience the tantalizing notion of parallel universes: universes just like ours containing doppelgangers of all of us, but in which different life choices have resulted in small or large differences. In most franchises, these parallel universes evolve independently of our own, until a sorcerer opens some kind of portal allowing protagonists to travel the multiverse.\r\n\r\nBeyond superhero comics, the equations of quantum mechanics can be interpreted to state that amazingly, parallel universes exist also in our actual physical reality. These actual parallel universes are simultaneously less and more fun than the parallel universes of fantasy and science fiction stories: On the one hand, these actual parallel universes cannot be traveled to. On the other, they continuously interfere with each other, not only after a portal has been opened.\r\n\r\nMoreover, many physical phenomena can only be explained with this continuous interference of parallel universes. Mirrors and photosynthesis, for instance, but also quantum computers. Quantum computers operate in a much more subtle manner than \"trying computations in parallel, distributed across universes\" as somehow depicted in popular accounts of quantum computing.\r\n\r\nThis talk provides a leisurely introduction to this circle of ideas, aimed at people who would like to understand what modern physics has to say about the multiverse. The talk will culminate in a discussion of a certain quantum algorithm providing exponential speedup over its classical cousin.\r\n\r\nContents:\r\n- interference in general\r\n- Schrödinger's cat, but quantitatively\r\n- a tiny glimpse of quantum electrodynamics\r\n- performing a quantum prediction ourselves\r\n- quantum circuits\r\n- the penny game\r\n- Deutsch–Josza algorithm\r\n\r\n**[References](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-30T11:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T12:20:00+01:00"
},
{
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"kind": "sos",
"name": "How to grow Weed 101, 2 years of applyed learning",
"slug": "how-to-grow-weed-101-2-years-of-applyed-failure-d",
"url": "https://api.events.ccc.de/congress/2025/event/de363c6f-35c9-4eec-bf19-c5a3a5057f5f/?format=api",
"track": null,
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"language": "de, en",
"description": "How to grow Weed 101, just use your command LLM Overloard to translate if you dont just want to come by and have a hear :D",
"schedule_start": "2025-12-29T23:00:00+01:00",
"schedule_duration": "00:50:00",
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},
{
"id": "30d4afbb-ff74-5adf-a485-1b16d49ba0bd",
"kind": "sos",
"name": "How to SoS: Schnittstelle zwischen Openki und Hub",
"slug": "how-to-sos-schnittstelle-zwischen-openki-und-hub",
"url": "https://api.events.ccc.de/congress/2025/event/30d4afbb-ff74-5adf-a485-1b16d49ba0bd/?format=api",
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"description": "Austauschrunde Wir wollen ermöglichen, dass Self organized Sessions über Openki organisiert werden können. Und ausprobieren wie das wäre. Kontext: Am internationalen antiautoritären Treffen in St.Imier in der Schweiz haben 2023 tausende Menschen Openki das erste mal genutzt und in Folge auch für den Congress vorgeschlagen. Die Argumente waren, dass auf Openki mehr Kollaboration und mehr Austausch stattfinden kann und dass Dialoge zu Themen auch weiter vor und nach dem Kongress passieren dürften. Leztes Jahr wurde es für die Organisation vom Håck ma's Castle https://sessions.hack-mas.at/ benutzt und hat einige zusätzliche Schnittstellen zu CCC infrastruktur bekommen. Nun testen wir es am Congress. Let's speak about it und lass uns mal probieren.",
"schedule_start": "2025-12-29T15:00:00+01:00",
"schedule_duration": "00:50:00",
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},
{
"id": "2c85274f-f5f4-4353-aa66-b2cbf99071a3",
"kind": "sos",
"name": "How to thrive in chaos, Part II",
"slug": "how",
"url": "https://api.events.ccc.de/congress/2025/event/2c85274f-f5f4-4353-aa66-b2cbf99071a3/?format=api",
"track": null,
"assembly": "sos",
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"description": "Based on last year's session \"How to thrive in Chaos\", Part II will be about the topics, data and open questions we did not discuss last time. (https://events.ccc.de/congress/2024/hub/de/event/how-to-thrive-in-chaos-discussion-round-about-chal/)\r\n\r\n\r\n**Last year's announcement text:**\r\n\r\nADHD is becoming increasingly visible in society and research, with many individuals receiving late diagnoses, especially women with ADHD. While there has been progress at universities, including the formation of student groups for neurodiverse individuals, there remains a lack of visibility for neurodiverse researchers. This discussion round aims to provide a safe space for everyone - whether they have an ADHD diagnosis or not - to discuss the challenges and benefits of working as a neurodiverse researcher. You are welcome to share your experiences and strategies to manage the chaos, but no one will be forced to.\r\n\r\nModeration: Sarah, who received her ADHD diagnosis in 2023, works as a data scientist since May 2024. She will share her experiences and strategies as a woman in science with ADHD, in order to increase the awareness and provide (hopefully) helpful insights.\r\n\r\nTarget audience:\r\n- Neurodiverse individuals (with or without a diagnosis)\r\n- Researchers collaborating with neurodiverse colleagues\r\n- Anyone interested in learning about the needs and challenges of individuals diagnosed with ADHD\r\n\r\nOther neurodiverse individuals are also warmly invited to join the discussion and share their knowledge. However, due to Sarah's own diagnosis, she will primarily address ADHD related topics, as she can only talk about her own experiences",
"schedule_start": "2025-12-27T18:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T18:55:00+01:00"
},
{
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"kind": "sos",
"name": "Humanitarian Mapping mit HOTOSM",
"slug": "humanitarian-mapping-mit-hotosm",
"url": "https://api.events.ccc.de/congress/2025/event/09195ae8-57f3-4598-9acb-c84ecf977989/?format=api",
"track": null,
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"location": "CCCHB Assembly (Saal X)",
"language": "de, en",
"description": "I would like to map with you all and invite you to the humanitarian Mapathon on the #39C3! This session is aimed towards inexperienced and experienced mappers, its idea is to get together, map together and get in contact. \r\n\r\nWhat is an humanitarian mapathon? Civil aid organisations are worldwide relying on reliable map data to be able to aid in the case of a catastrophe. If infrastructure is destroyed the data needs to be updated soon so the helpers know who needs the aid. For this they rely on volunteer mappers who update the data. Based on satillite imagery the data in OpenStreepMap is being updated via the hotosm.org website and validated and therefore are availabele to the helpers. \r\n\r\nWhat is my perspective? I studied Geography and I'm active in the GeoDACH network. In the students community HOTOSM is gaining popularity, in January there will be an humanitarian mapathon all across Germany, Austria and Switzerland at universities, in that context I'd like to instroduce humanitarian mapping at #39C3.",
"schedule_start": "2025-12-28T12:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T12:25:00+01:00"
},
{
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"kind": "sos",
"name": "Hypoglucocorticoide Krise",
"slug": "hypoglucocorticoide-krise",
"url": "https://api.events.ccc.de/congress/2025/event/f25ef503-13d5-44c7-b903-98b7cf502f95/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "CERT Assembly",
"language": "de",
"description": "Only in german, sorry. About the hypoglucocortide crisis",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T18:00:00+01:00"
},
{
"id": "72be6b47-ab8d-4b1c-8d25-4c571ab6f876",
"kind": "sos",
"name": "iCoo - A Platform for Activists",
"slug": "icoo-a-platform-for-activists",
"url": "https://api.events.ccc.de/congress/2025/event/72be6b47-ab8d-4b1c-8d25-4c571ab6f876/?format=api",
"track": null,
"assembly": "sos",
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"language": "en",
"description": "iCoo is a group chat app where affinity groups can create collaborative networks! Get to know the Hat-Picker and start networking with your group!\r\n\r\nI'm trying to develop an app for the activist and intentional communities that is in essence a \"Kickstarter, but for signing up affinity groups, instead of money.",
"schedule_start": "2025-12-30T15:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T15:25:00+01:00"
},
{
"id": "722962f5-4054-4ad7-a2fd-5d4f33e4bd0e",
"kind": "sos",
"name": "Illegal board games: Let's play provopoly!",
"slug": "illegal-board-games-lets-play-provopoly",
"url": "https://api.events.ccc.de/congress/2025/event/722962f5-4054-4ad7-a2fd-5d4f33e4bd0e/?format=api",
"track": null,
"assembly": "sos",
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"location": "House of tea (look for the game board)",
"language": "de",
"description": "Unfortunately this game has not yet been translated into english. Are you interested to power cycle a translation, please talk to me DECT 9394\r\n\r\nfor more info, please refer to the [german description](https://events.ccc.de/congress/2025/hub/de/event/detail/illegal-board-games-lets-play-provopoly) of this event",
"schedule_start": "2025-12-27T20:30:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-27T22:30:00+01:00"
},
{
"id": "b822ef22-ef29-4c0d-897d-0ebb7a96a9f2",
"kind": "sos",
"name": "Inklusion and Research Data Management (RDM): Missing visibility of neurodivergent researcher",
"slug": "inklusion-and-research-data-management-rdm-mi_rje7",
"url": "https://api.events.ccc.de/congress/2025/event/b822ef22-ef29-4c0d-897d-0ebb7a96a9f2/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
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"language": "en",
"description": "Data literacy and digitalisation are crucial topics in today's research institutions, to tackle global challenges like climate change, the dramatic loss of species and the erosion of democracy. Nevertheless, most research data is not digitalised nor back-uped; reproducible & transparent research is often a dream.\r\nIn Research Data Management, a lot of guidlines exist to face these difficulties: Data Management Plans, FAIR data, ELSA, etc. It seems like there is a strategy and buzzword for every problem.\r\n\r\n**But what is missing is a discussion, if these strategies are inclusive (for neurodivergent people).** How can we alter them, what is needed for you to apply them?\r\n\r\nNo matter if you are a researcher, who has to apply all those strategies, a Data Steward teaching them, or just interested in the topic: I would love to **discuss** with you about your experiences in digitalisation in research institutions & universities and hear about your experiences to raise awareness in the research data community.\r\n\r\nAbout the speaker Sarah Büker:\r\nWhile working as a Data Scientist at the Data Science Center (BMFTR founded Data Nord Project @ University of Bremen) and beeing neurodivergent myself, I have faced a lot of exclusive strategies and would love to change the current situation.",
"schedule_start": "2025-12-28T20:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T21:20:00+01:00"
},
{
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"kind": "sos",
"name": "Install party - Reflection local-first collaborative note taking",
"slug": "install-party-reflection-local-first-collaborative",
"url": "https://api.events.ccc.de/congress/2025/event/12f59f79-fab4-433c-8e8a-ccdd1958eb5a/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Hall 1 Balcony Foyer (next to Nap Lab)",
"language": "en, de",
"description": "Join us for this install party!\r\n\r\nReflection is a collaborative note taking app which follows a local-first approach.\r\n\r\nThe notes can be synchronized using a P2P network layer and do not require a centralized server. \r\n\r\nA beta version of Reflection was released this week and we will use this occasion to install it and use it together.\r\n\r\nYou will need a Linux laptop with a working desktop environment and flatpak installed. \r\n\r\nYou will find the latest installation instructions here: https://github.com/p2panda/reflection/blob/main/README.md",
"schedule_start": "2025-12-28T11:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T12:20:00+01:00"
},
{
"id": "53dc2e97-3316-4bf3-a099-eda7c7b0045c",
"kind": "sos",
"name": "Internet Censorship Meetup",
"slug": "internet-censorship-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/53dc2e97-3316-4bf3-a099-eda7c7b0045c/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Bits&Bäume Living Room",
"language": "en",
"description": "Do you care about internet censorship? Do you work against it, study it, measure it? Want to come chat with likeminded people at CCC? Please come and join us!",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T18:00:00+01:00"
},
{
"id": "caef9e32-8b3b-4e91-9710-6b7f2ecf6079",
"kind": "sos",
"name": "Introduction to Embedded Rust for beginners (for Hakkaa-Board workshop)",
"slug": "einfuhrung-embedded-rust-fur-workshop-hakkaa-_mlyg",
"url": "https://api.events.ccc.de/congress/2025/event/caef9e32-8b3b-4e91-9710-6b7f2ecf6079/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en, de",
"description": "_Introduction to Embedded Rust on Microcontrollers and the [Hakkaa workshop task](https://events.ccc.de/congress/2025/hub/en/project/detail/assembly/hakkaa-board-smd-soldering-embedded-rust-for-begin/). This introduction is mostly aimed at beginner participants._\r\n\r\nWe'd like to give you an introduction to Rust on a microcontroller based on [Rust programming language: An absolute beginner workshop with intro presentation](https://events.ccc.de/congress/2025/hub/de/event/detail/rust-programming-language-an-absolute-beginner-wor). It aims to show you the little differences of this environment, presenting the workshop challenge and pointing you in the right direction for getting started.\r\n\r\nThis session starts with a presentation of about 30 minutes in English and a round of questions for all. After that, our team supports you with your first self-paced steps.\r\n\r\nThe initial part of the presentation covers using Rust on a microcontroller in general. The second part focuses on working with the Hakkaa board.\r\n\r\nIf you've got a question after this session, you can find us at the Hakkaatachi assembly or in [our Matrix chat](https://matrix.to/#/#hakkaatachi-39c3:matrix.org).\r\n\r\nWe recommend:\r\n\r\n* Having a soldered and tested [Hakkaa-Board](https://github.com/hakkaatachi/hakkaa-hardware) (whose kit you can get at the Hakkaatachi assembly)\r\n* Your laptop set up with the [development tooling](https://github.com/hakkaatachi/hakkaa-firmware?tab=readme-ov-file#setup) so that you can spend more time on programming than on installing\r\n* Your laptop fully charged\r\n\r\nReferences:\r\n\r\n* [Presentation Slides](https://christian-meusel.de/presentations/2025-39c3-embedded-rust-for-hakkaa-2/)",
"schedule_start": "2025-12-29T13:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T14:20:00+01:00"
},
{
"id": "08ff4742-e400-4fa3-a279-9a7e5c3e572b",
"kind": "sos",
"name": "Introduction to Embedded Rust for intermediate to advanced participants (for Hakkaa-Board workshop)",
"slug": "einfuhrung-embedded-rust-fur-workshop-hakkaa-board",
"url": "https://api.events.ccc.de/congress/2025/event/08ff4742-e400-4fa3-a279-9a7e5c3e572b/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "en, de",
"description": "_Introduction to Embedded Rust on Microcontrollers and the [Hakkaa workshop task](https://events.ccc.de/congress/2025/hub/en/project/detail/assembly/hakkaa-board-smd-soldering-embedded-rust-for-begin/). This introduction is mostly aimed at participants with some experience in Rust._\r\n\r\nFor everyone who has already taken their first steps with Rust and can't wait to get knee-deep into using Rust on a Microcontroller. It aims to show you the little differences of this environment, presenting the workshop challenge and pointing you in the right direction for getting started.\r\n\r\nFor absolute beginners we recommend to attend [Rust programming language: An absolute beginner workshop with intro presentation](https://events.ccc.de/congress/2025/hub/de/event/detail/rust-programming-language-an-absolute-beginner-wor) first and then our [second round of this introduction on day three](https://events.ccc.de/congress/2025/hub/de/event/detail/einfuhrung-embedded-rust-fur-workshop-hakkaa-_mlyg).\r\n\r\nThis session starts with a presentation of about 30 minutes in English and a round of questions for all. After that, our team supports you with your first self-paced steps.\r\n\r\nThe initial part of the presentation covers using Rust on a microcontroller in general. The second part focuses on working with the Hakkaa board.\r\n\r\nIf you've got a question after this session, you can find us at the Hakkaatachi assembly or in [our Matrix chat](https://matrix.to/#/#hakkaatachi-39c3:matrix.org).\r\n\r\nWe recommend:\r\n\r\n* Having a soldered and tested [Hakkaa-Board](https://github.com/hakkaatachi/hakkaa-hardware) (whose kit you can get at the Hakkaatachi assembly)\r\n* Your laptop set up with the [development tooling](https://github.com/hakkaatachi/hakkaa-firmware?tab=readme-ov-file#setup) so that you can spend more time on programming than on installing\r\n* Your laptop fully charged\r\n\r\nReferences:\r\n\r\n* [Presentation Slides](https://christian-meusel.de/presentations/2025-39c3-embedded-rust-for-hakkaa-2/)",
"schedule_start": "2025-12-27T19:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-27T20:50:00+01:00"
},
{
"id": "a33b35f8-6391-43de-895a-8b58d8dd84b1",
"kind": "sos",
"name": "Introduction to Hardware Hacking with the Sword of Secrets",
"slug": "introduction-to-hardware-hacking-with-the-sword-of",
"url": "https://api.events.ccc.de/congress/2025/event/a33b35f8-6391-43de-895a-8b58d8dd84b1/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "TAMI Assembly",
"language": "en",
"description": "Sword of Secrets is a multi-stage hardware Capture the Flag platform designed for learning hands-on embedded hacking. In this workshop, participants will use the virtual Sword of Secrets, a fully simulated environment that mirrors the real device, allowing exploration of schematics, datasheets, firmware, and low-level behavior without physical hardware.\r\n\r\nParticipants will analyze the virtual system to identify attack surfaces, reason about firmware behavior, and solve selected challenge stages with guided support. The focus is on developing practical intuition and problem-solving skills rather than following step-by-step instructions, making the workshop suitable for curious beginners as well as experienced hackers.",
"schedule_start": "2025-12-28T13:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T13:25:00+01:00"
},
{
"id": "896d1dbb-b773-40d2-b263-117ca640895e",
"kind": "sos",
"name": "Introduction to Hardware Hacking with the Sword of Secrets (On-going)",
"slug": "introduction-to-hardware-hacking-with-the-swo_t4v5",
"url": "https://api.events.ccc.de/congress/2025/event/896d1dbb-b773-40d2-b263-117ca640895e/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "en",
"description": "Introduction to a multi-stage hardware Capture the Flag platform designed for learning hands-on embedded hacking.",
"schedule_start": "2025-12-30T15:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T15:55:00+01:00"
},
{
"id": "6bf99a5e-fc12-4c54-bdb6-66347abe6a52",
"kind": "sos",
"name": "Introduction to Hardware Hacking with the Sword of Secrets (On-going)",
"slug": "introduction-to-hardware-hacking-with-the-swo_celx",
"url": "https://api.events.ccc.de/congress/2025/event/6bf99a5e-fc12-4c54-bdb6-66347abe6a52/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "TAMI Assembly",
"language": "en",
"description": "Sword of Secrets is a multi-stage hardware Capture the Flag platform designed for learning hands-on embedded hacking. In this workshop, participants will use the virtual Sword of Secrets, a fully simulated environment that mirrors the real device, allowing exploration of schematics, datasheets, firmware, and low-level behavior without physical hardware.\r\n\r\nParticipants will analyze the virtual system to identify attack surfaces, reason about firmware behavior, and solve selected challenge stages with guided support. The focus is on developing practical intuition and problem-solving skills rather than following step-by-step instructions, making the workshop suitable for curious beginners as well as experienced hackers.",
"schedule_start": "2025-12-29T13:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T13:25:00+01:00"
},
{
"id": "b07842d0-89e6-476f-bf1e-4a4ef31d8e4c",
"kind": "sos",
"name": "Intro workshop to OpenMates: An open source alternative to ChatGPT, Manus, Claude, etc.",
"slug": "intro-workshop-to-openmates-an-open-source-alterna",
"url": "https://api.events.ccc.de/congress/2025/event/b07842d0-89e6-476f-bf1e-4a4ef31d8e4c/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "xHain Assembly (might change later. Check again before workshop!)",
"language": "en",
"description": "## Who should join?\r\n\r\nAnyone with an interest in working with AI chatbots, a desire for more independence from big tech, and the curiosity to try out new software while it’s still in an alpha stage.\r\n\r\n\r\n## What to bring?\r\n\r\nA laptop with Docker & Docker Compose installed.\r\n\r\n\r\n## About the workshop & software:\r\n\r\nAI chatbots can do more than just vibe coding & slop creation. If properly used, they can be both an incredible learning tool and a super helpful assistant for everyday tasks. In this workshop, you learn how to set up and use the Self-Hosting Edition of OpenMates — a user-interest- and privacy-focused alternative to big tech AI chatbots like ChatGPT, Manus, Claude, and others — powered by various API-based (and, in the future, also offline) AI models.\r\n\r\nThink of OpenMates as the next-generation operating system in the form of chatbots that can use various apps and external providers for a wide range of daily tasks — combined with a focus on educating & inspiring, making individualized learning accessible to everyone without compromising privacy.\r\n\r\nOpenMates is, so far, a single-person project in its alpha stage and under very active development.\r\n\r\n## Git repo:\r\n\r\nhttps://github.com/glowingkitty/OpenMates\r\n\r\n## Links:\r\n\r\nhttps://pad.dev.openmates.org/p/OpenMates_Intro_Workshop_39c3\r\n\r\n## Website & Web App:\r\n\r\nhttps://openmates.org",
"schedule_start": "2025-12-28T15:30:00+01:00",
"schedule_duration": "01:30:00",
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},
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"kind": "sos",
"name": "Iznova medžuslovjansky! Igry i zabavy.",
"slug": "interslavic-2",
"url": "https://api.events.ccc.de/congress/2025/event/0a4efd16-8281-4258-97d7-66e43badd131/?format=api",
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"description": "Stille Post? Głuchy Telefon?\r\n\r\nKak byhmo nazvali izvěstne igry?\r\n\r\nKakyh izrěčenij hocemy upotrěbjati?\r\n\r\nVozmimo medžuslovjansky w naše ruki :)",
"schedule_start": "2025-12-30T00:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T00:25:00+01:00"
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{
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"kind": "sos",
"name": "Jonglier Workshop",
"slug": "jonglieren",
"url": "https://api.events.ccc.de/congress/2025/event/cdf2918d-fe66-4f97-9f94-3059486eed34/?format=api",
"track": null,
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"location": "Foyer im EG",
"language": "de",
"description": "Du findest du Jonglieren cool und wolltest es schon immer mal ausprobieren? Oder kannst du schon jonglieren und möchtest einen neue Trick lernen oder mit anderen zusammen Jonglieren? Dann komm gerne vorbei!\r\n\r\nIch werde Bälle, Ringe und 6 Keulen mitbringen. Ihr könnt gerne eigenes Jonglierzeug mitbringen.\r\n\r\nAnfängern zeige ich Übungen um 3 Bälle zu lernen. Fortgeschrittenden kann ich gerne ein paar Tricks zeigen oder wir passen ein Runde.\r\n\r\nIch freue mich auf euch!",
"schedule_start": "2025-12-28T17:00:00+01:00",
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},
{
"id": "eb88bd6b-3f79-4145-9521-17ba53cde44a",
"kind": "sos",
"name": "Jujutsu: A Git-compatible version control system",
"slug": "jujutsu-a-git-compatible-version-control-system",
"url": "https://api.events.ccc.de/congress/2025/event/eb88bd6b-3f79-4145-9521-17ba53cde44a/?format=api",
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"description": "Jujutsu (jj) is a new version control system that uses Git as its backend. Since trying it last year, it has completely replaced Git for me. It manages to be less complex than Git, while giving you more control. I think you'll like it too!\r\n\r\nLately, when people ask me complex Git questions, my answer is often: \"First, install jj…\" And that's only half a joke. :P\r\n\r\n---\r\n\r\nA few things I like about Jujutsu: There's no index, but instead you get a subcommand for splitting changes. Commits have stable IDs that stay the same even after rewriting. Anonymous branches! Conflicts are first-class objects and don’t have to be resolved immediately during a rebase. Rewriting history is very easy.\r\n\r\nAnd because it's Git-compatible, you can use Jujutsu right away in existing projects without anyone else noticing. :3\r\n\r\nI'm planning to do this session in two parts: First, an introductory talk about jj. After that, a \"workshop\" part where you can install Jujutsu and try it for yourself!",
"schedule_start": "2025-12-27T11:00:00+01:00",
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"url": "https://api.events.ccc.de/congress/2025/event/a2c7e43a-42d0-434b-b9fd-44fd55a6d00e/?format=api",
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"description": "Von Jura-Studis über Rechtsanwältinnen und Rechtsanwälten bis zu Jura-Profs sind alle Jurist:innen i.w.S. eingeladen, sich gegenseitig in lockerer Runde kennenzulernen und zu vernetzen. \r\n\r\nDie verfügbaren Räume auf dem Congress sind knapp. Daher haben wir im SOS 6 nur 25 Minuten. Es wird vorgeschlagenen, ab 12 Uhr für weitere Gespräche in die Nähe des c3Späti weiterzuziehen (genauer Treffpunkt: Bottle Drop Point 73 am Geländer, direkt gegenüber der Chaos Post, in Blickweite des c3Späti). \r\n\r\nDer einladende Dickmaulrüssler ist Rechtsanwalt in Hamburg.\r\n\r\nDECT: 8018",
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},
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"url": "https://api.events.ccc.de/congress/2025/event/b6738b82-4af2-4e01-bc63-6baa7c4faeed/?format=api",
"track": null,
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"language": "de",
"description": "Wir erzählen euch wie Palantir in Baden-Württemberg Fuß fasste, wie wir versuchten dagegen vorzugehen und was ihr daraus lernen könnt.",
"schedule_start": "2025-12-29T13:30:00+01:00",
"schedule_duration": "00:50:00",
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},
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"kind": "sos",
"name": "Kherson. LGBTQ+ under occupation.",
"slug": "kherson-lgbtq-under-occupation",
"url": "https://api.events.ccc.de/congress/2025/event/9d2741d5-e1cb-4566-b225-7c1c2fed41f7/?format=api",
"track": null,
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"description": "Queer People in Occupied Territories: Cases from Kherson\r\n\r\nThis talk is about the experiences of queer people living in the temporarily occupied territories of Ukraine, with a focus on Kherson.\r\n\r\nUsing real-life cases, it shows how war, occupation, and strict control affect LGBTQ+ people’s daily lives — their safety, visibility, ability to stay true to their identity, and to keep in touch with their community.\r\n\r\nThe talk will cover:\r\n\r\nRisks and survival strategies under occupation, including hiding one’s identity, internal and external displacement, and self-censorship.\r\n\r\nViolence and threats faced by LGBTQ+ people, from psychological pressure and blackmail to direct repression by the occupying authorities.\r\n\r\nThe talk will be held online.",
"schedule_start": "2025-12-27T23:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T00:20:00+01:00"
},
{
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"name": "KI in der Softwareentwicklung - Austausch",
"slug": "ki-in-der-softwareentwicklung-austausch",
"url": "https://api.events.ccc.de/congress/2025/event/2ec50545-8497-4472-83e9-6bf82a7373f6/?format=api",
"track": null,
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"location": "Vegan Chaos Community (Assembly L6-M6, Hall Y, Level2)",
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"description": "Software development is currently undergoing radical change, starting with simple chat with ChatGPT (and other providers), moving on to co-pilots, IDEs such as Cursor that are optimized for development with LLMs, and then to background agents and vibe coding, and whole cascades and products based on LLMs that promise to independently review code or develop entire features.\r\n\r\nBut what I still find lacking today is a more honest, open, and offline exchange about real experiences in the “new world.”\r\n\r\nThe session is intended to provide a space for exchange, for sharing experiences and opinions, and for learning from each other, away from the everyday bubble, capitalist sales machine, and media hype.\r\n\r\nThere is no fixed plan or frontal presentation for this session; rather, the aim is to create a space for exchange.\r\n\r\nWe will meet at the assembly of the Vegan Chaos Community (Assembly L6-M6, Hall Y, Level2) in day 2 (28 Dec.) at 15:00. And then we see how many come and where we can talk.\r\n\r\nIf you would like to share something in advance or are part of an assembly and would like to participate in such a discussion, please contact me at thacoon@posteo.de (this is the first session I am organizing).",
"schedule_start": "2025-12-28T15:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T16:00:00+01:00"
},
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"name": "KinkyGeeks + RopeLabs Beginner Bondage Workshop Part II: Next Steps",
"slug": "102-kinkygeeks-ropelabs-bondage-workshop-building-",
"url": "https://api.events.ccc.de/congress/2025/event/7068e69d-5a1b-4810-943f-838a0d81514d/?format=api",
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"description": "KinkyGeeks and RopeLabs join forces to host a follow up Beginner Bondage Workshop.\r\n\r\nInstructors @DoodleMe and @KnottyLola explore next steps in Japanese rope bondage. 18+ lab-mode workshop. Bring rope and a blanket if you have them. Attendance at the beginner class helps but is not required.\r\n\r\nThis workshop expands on theory and knots from the beginner class and moves at a faster pace. We will briefly recap key skills such as single and double column ties, then progress from there.\r\n\r\nThis session suits those with some rope experience or those who attended the introductory workshop. You do not need to have taken Part I, but you should be comfortable with basic rope handling.\r\n\r\nThe workshop runs in lab mode. It is fully clothed, non-sexual, and open to participants aged 18 and over only.\r\n\r\nSingles, pairs, and groups are welcome. Space is limited by the room size. \r\n\r\nPlease bring your own non-stretch rope if you have it, plus a blanket or cushion for sitting on the floor. Avoid loose clothing where possible. The workshop will be taught in English.\r\n\r\nPlaces are limited by room size. You will need a ticket per person.\r\nGet your free ticket here: [https://ticket.kinkygeeks.de/kinkygeeks/102-1/](https://ticket.kinkygeeks.de/kinkygeeks/102-1/)",
"schedule_start": "2025-12-28T21:30:00+01:00",
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"schedule_end": "2025-12-28T22:50:00+01:00"
},
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"kind": "sos",
"name": "Kleidung reparieren/ How to repair your clothes (time and place will be changed!)",
"slug": "kleidung-reparieren-how-to-repair-your-clothes",
"url": "https://api.events.ccc.de/congress/2025/event/d017d92d-cd38-496d-8c5c-1a734223fd2f/?format=api",
"track": null,
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"language": "de, en",
"description": "We will loock at different repair methods and their results, afterwards you cant try for yourself. If you have clothing in need for repair, please bring it",
"schedule_start": "2025-12-27T12:00:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-27T13:30:00+01:00"
},
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"name": "Knoten-Workshop!!11!",
"slug": "knoten-workshop11",
"url": "https://api.events.ccc.de/congress/2025/event/0e94fea1-5b5e-4fae-9fca-3e81e6b68403/?format=api",
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"language": "de, en",
"description": "Für alle die Knoten für alles Mögliche lernen möchten.",
"schedule_start": "2025-12-28T23:00:00+01:00",
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"schedule_end": "2025-12-28T23:50:00+01:00"
},
{
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"kind": "sos",
"name": "Kritische Psycholog:innen Treffen",
"slug": "kritische-psychologinnen-treffen",
"url": "https://api.events.ccc.de/congress/2025/event/4dd9c0cc-5d50-422b-946d-550e89173c18/?format=api",
"track": null,
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"location": "Bottle Drop Point 73 ggü Chaospost (https://39c3.c3nav.de/l/c:2:236.81:166.61/)",
"language": "de",
"description": "Offenes Austauschtreffen für alle Psychologie Studis, Psycholog:innen, PiAs/PtWs und approbierte Psychotherapeut:innen zum **Kennenlernen und Vernetzen** :)\r\n\r\nTreffpunkt: Bottle Drop Point 73 am Geländer, direkt gegenüber der Chaos Post, in Blickweite des c3Späti (https://39c3.c3nav.de/l/c:2:236.81:166.61/)\r\nWenn ihr uns nicht findet: DECT: 8454 (bzw. +49 40 5730830 8454)\r\n\r\nFalls Interesse an der Kritischen Psychologie besteht, können wir uns auch dazu gerne austauschen. Einen kleinen Denkanstoß in Zitatform habe ich mitgebracht, aber vielleicht habt ihr ja auch eigene Literatur, die euch bewegt! \r\n\r\nSchreibt mir gerne hier im Hub ne kurze Nachricht, dann weiß ich, ob sich überhaupt jemand angesprochen fühlt :D \r\n\r\n\r\n**Denkanstoß**\r\n\r\n\"Die Frage, mit der sich die Kritische Psychologie beschäftigt, lautet demzufolge: Unter welchen Voraussetzungen kann man es sich leisten, die Einbezogenheit in die Unterdrückung anderer auf den Begriff zu bringen und die damit verbundenen Konflikte auf sich zu nehmen, und unter welchen Bedingungen zieht man es vor, die Eingeschränktheit und dadurch bedingte Asozialität des eigenen Handelns zu leugnen bzw. alle Lebensansprüche – bei sich und anderen – zu verdrängen, die das Arrangement mit den herrschenden Verhältnissen und dessen Problematik deutlich werden lassen könnten.\" \r\n— II. Vorwort von Ute Osterkamp (S. 11) in Klaus Holzkamps Schriften I Normierung, Ausgrenzung Widerstand, 1997",
"schedule_start": "2025-12-28T18:30:00+01:00",
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},
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"name": "LAUTI Open Source Community Calendar - Beginner Workshop",
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"url": "https://api.events.ccc.de/congress/2025/event/3bb9e75e-60ad-41e9-89fa-ffd523d117f3/?format=api",
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"location": "Co-op Cloud Assembly ( https://events.ccc.de/congress/2025/hub/de/assembly/detail/coopcloud )",
"language": "de, en",
"description": "LAUTI ( https://lauti.org/en/ ) is your open source community calendar and offers you a non-commercial independent organizing platform. Invite friends, groups and places and let them fill the site with their events. Use it for independent calenders for cities or regions, for political and cultural events, demonstrations, activism, special interest communities and everything you can imagine.\r\n\r\nWe want to take a look into LAUTI together, share how it works, and maybe setup your own instance. Come by and get to know Lauti and us!",
"schedule_start": "2025-12-29T15:30:00+01:00",
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},
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"name": "Legale, Halblegale und andere Tricks um ohne Geld durch die Welt zu kommen",
"slug": "legale-halblegale-und-andere-tricks-um-ohne-geld-d",
"url": "https://api.events.ccc.de/congress/2025/event/64bf122a-c2bd-4ae3-9ce1-8445718fe546/?format=api",
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"assembly": "sos",
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"location": null,
"language": "de",
"description": "Von Tricks zu bekannten Klassikern wie Containern, über eher unbekannte Geheimnisse, wie den Häppchenmelder und Gesundheitsversorgung für den Kampf im Untergrund, drehen wir. Hier gibt's eine gute Übersicht über das Leben zwischen Existenz-Minimum und Schabernack-Maximum.\r\n16:04",
"schedule_start": "2025-12-27T19:30:00+01:00",
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},
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"name": "📑 Lesezeichen 2: Das JavaScript schlägt zurück 👾",
"slug": "lesezeichen-2-das-javascript-schlagt-zuruck",
"url": "https://api.events.ccc.de/congress/2025/event/12f961db-5b94-4a65-94ed-28ee1feff1df/?format=api",
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"language": "de",
"description": "What if your browser bookmarks didn't just save an address, but unlocked a whole arsenal of features? I'll show you how to unleash the power of the modern web directly from your bookmarks bar with bookmarklets. Whether it's webcam access, clipboard hacks, full-screen action or spontaneous library reloading, this talk is a firework display for anyone who loves JavaScript and wants to push boundaries. There are also tips on minification, troubleshooting, and even creating blobs and playing sounds. Nerdy, practical, surprising – a must for web tinkerers and JavaScript Jedis 🥷\r\n\r\nSome of the bookmarklets: https://hackmd.io/MhSV_LgMT96Wb4A8D_tajg?view",
"schedule_start": "2025-12-30T13:30:00+01:00",
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},
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"name": "LessWrong Congress Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/f035bc76-487b-4cf0-a856-d49d3f39cd59/?format=api",
"track": null,
"assembly": "sos",
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"language": "de, en",
"description": "This is a meetup for everyone already being part of or interested in the LessWrong/Rationality movement. The idea is to have a short introduction to Rationality and exchange ideas across city-borders. \r\n\r\nWikipedia:\r\n> LessWrong [...] is a community blog and forum focused on discussion of cognitive biases, philosophy, psychology, economics, rationality, and artificial intelligence, among other topics. It is associated with the rationalist community. \r\n\r\nNOTICE: \"artificial intelligence\" is in relation to artificial general intelligence (AGI) which are speculated since the 50s and there are no technologies like this invented yet. This has nothing to do with transformers / LLM / GPT.\r\n\r\nMy (saxnot) personal favourite ist [https://www.lesswrong.com/s/HXkpm9b8o964jbQ89](https://www.lesswrong.com/s/HXkpm9b8o964jbQ89) about molloch (complexity/clutter) away from your calendar/todo/life\r\n\r\n[https://www.lesswrong.com/](https://www.lesswrong.com/)",
"schedule_start": "2025-12-30T01:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T02:20:00+01:00"
},
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"kind": "sos",
"name": "Let's look at the Sun together!",
"slug": "lets-look-at-the-sun-together",
"url": "https://api.events.ccc.de/congress/2025/event/429f1460-dce6-4477-a239-f0b79002eca7/?format=api",
"track": null,
"assembly": "sos",
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"location": "Hall H rooftop (AKA Smoking Area)... in a corner away from the smokers",
"language": "en",
"description": "Don't worry - I brought a solar telescope with me! If the sky is clear, we can look at the sun, sunspots, and see prominences on the edge. If we're lucky we might see a solar flare!",
"schedule_start": "2025-12-28T12:15:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T13:05:00+01:00"
},
{
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"kind": "sos",
"name": "let's play geoguessr!",
"slug": "lets-play-geoguessr",
"url": "https://api.events.ccc.de/congress/2025/event/97add864-bcbb-4da7-8f75-f8dc6eb5c316/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "We have a premium geoguessr subscription and some time, wanna join? \r\n\r\nWe can do live challenges with up to 100 players so some team work may be required but we hope to see you there :3\r\n\r\nAll you need to participate is a device that can access the internet, winner(s) will get a (small) prize\r\n\r\nOtherwise unrelated to .meow besides the organisers, we just wanted to do something fun!",
"schedule_start": "2025-12-30T00:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T00:55:00+01:00"
},
{
"id": "b76c4dbb-d171-4ae2-a26c-ba79b7a7dd85",
"kind": "sos",
"name": "Lets Play Joustmania",
"slug": "lets-play-joustmania",
"url": "https://api.events.ccc.de/congress/2025/event/b76c4dbb-d171-4ae2-a26c-ba79b7a7dd85/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Foyer hinter dem Eingang / Cash Desk",
"language": "de, en",
"description": "We play a round of Joustmania!\r\nCome along and play a round, you can join and / or leave anytime :) \r\n\r\n\r\nJoustmania is a movement-intensive group game for 3-20+ people. In the game, each player is given a PlayStation Move controller, which monitors the player's movements.\r\nAs soon as their controller accelerates too quickly, they are eliminated from the game. The competitors therefore try to defeat their opponents by nudging their controllers.\r\n\r\nThere are different game modes with slightly different rules.\r\n\r\nIf you want to find out more about this game:\r\n- There will be an “Ask me Anything” slot on day two\r\n- Feel free to contact me by phone: 8260 or write to van (at) chaospott.de",
"schedule_start": "2025-12-27T17:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T17:25:00+01:00"
},
{
"id": "a400fed5-ae3a-4d1f-91dc-198b3ff0e0dd",
"kind": "sos",
"name": "Libre Graphics Kaffeekränzchen",
"slug": "libre-graphics-kaffeekranzchen",
"url": "https://api.events.ccc.de/congress/2025/event/a400fed5-ae3a-4d1f-91dc-198b3ff0e0dd/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Chill Lounge I5, Hall 1 Balcony Foyer, Level 4",
"language": "de, en",
"description": "For all beings who work with, create art with, develop, experiment, or are interested in everything that could be seen being graphics software. \r\n\r\nLet’s chat about experience, workflows, experiments, Libre Graphics Meeting 2026 plans, or bring your own topic.\r\n\r\nLoose affiliation with [libregraphicsmeeting.org](https://libregraphicsmeeting.org)\r\n\r\nUPDATE: Find us opposite the DJ next to Nap Lab",
"schedule_start": "2025-12-29T15:00:00+01:00",
"schedule_duration": "00:45:00",
"schedule_end": "2025-12-29T15:45:00+01:00"
},
{
"id": "40c58e95-bdc4-4e02-8d36-7ff9def7c890",
"kind": "sos",
"name": "LibreNMS Community Meetup",
"slug": "librenms-community-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/40c58e95-bdc4-4e02-8d36-7ff9def7c890/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Mainframe Assembly",
"language": "de, en",
"description": "Hello there,\r\n\r\nduring this year 39C3 we will organize a nice little community meetup for LibreNMS hobbyists, evangelists and professional amateurs! Even if you know what you’re doing, you are still welcome to join us. \r\n\r\nFor the small chance you were living under a rock and don’t know what LibreNMS is; \r\nLibreNMS is free software designed for service monitoring of complex IT infrastructures. It originated from a fork of the Observium software and specializes in hardware monitoring.\r\nLibreNMS is written in PHP and uses MySQL as its database. It automatically scans a network and retrieves the status and configuration via SNMP (as well as ARP, XDP, OSPF, BGP). LibreNMS supports a wide range of network hardware from various manufacturers and operating systems, such as Cisco, Linux, FreeBSD, Juniper, Brocade, Foundry, and HP.\r\nhttps://www.librenms.org/\r\n\r\nSome of the things we're going to talk about are: \r\n- Best practice for setup and processes\r\n- Tips and tricks for different deployments\r\n- What to do and why. What not to do and why not to do it!\r\n- Typical issues and how to solve or avoid them\r\n- Biggest pain points (e.g. autodiscovery by IP)\r\n\r\nAll in all, just friendly discussions about LibreNMS and helping each other out. \r\n\r\nHope to see you there\r\n\r\nWe will meet at the \"Mainframe\" Assembly. \r\n\r\nhttps://39c3.c3nav.de/l/mainframe/\r\n\r\nWe're going to use the following Signal Group in order to announce coordination changes during the event. \r\n\r\nhttps://signal.group/#CjQKIKyQQomhbVUdME9eKG8MIYdSZFXtgPU8zAuBQpGvOb0sEhBJvQLEtQpgEUlag3pEoy83\r\n\r\nAlternatively you may use DECT to get in contact. 8530. \r\n\r\nUlf",
"schedule_start": "2025-12-28T18:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T19:30:00+01:00"
},
{
"id": "d0bea5d7-af49-48f0-b33f-17979a806f52",
"kind": "sos",
"name": "Linux Distro Brainstorming",
"slug": "linux-distro-brainstorming",
"url": "https://api.events.ccc.de/congress/2025/event/d0bea5d7-af49-48f0-b33f-17979a806f52/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "section77 Assembly",
"language": "de, en",
"description": "Feel like the current state of Linux could be more secure & user friendly? Not happy with your Linux distro? Tried too many of them? \r\nEver wanted to learn how to build a Linux distro? You are already involved in maintaining one?\r\n\r\nThen this will be the session for you!\r\nWe'll meet up to discuss your ideas about how the future of Linux should look like.\r\n\r\nLet's assemble a team and figure out how to build an independent Linux distro together some time after congress :)\r\n\r\nDECT: MPEG (6734) \r\n[meetup point in c3nav](https://39c3.c3nav.de/l/section77)",
"schedule_start": "2025-12-29T14:45:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T15:10:00+01:00"
},
{
"id": "ec0fcce8-040f-4592-adc3-de85d55eb3aa",
"kind": "sos",
"name": "lonely@c3",
"slug": "lonelyc3_uo7a",
"url": "https://api.events.ccc.de/congress/2025/event/ec0fcce8-040f-4592-adc3-de85d55eb3aa/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Between Coffee Nerds and House of Tea",
"language": "de, en",
"description": "will probably cancel as I have to watch out for my capacity, check description shortly before\r\n\r\nHello,\r\nI would like to invite everybody, who suddenly realizes, that they feel a little lonely, although there are so many people around. I believe, especially because there so many, that its natual that loneliness arises. Its now my 5th congress, and although I always found myself in faszinating talks, had really deep philosophical exchanges, and always new impressions, there were many times in which I just felt alone and unconnected. I can imagine, that there are others, who find themselves in similar situations.\r\nTherefore, I want to invite us, to show to each other.\r\nWhat I intend to do is, that we meet every day from day 2 for a meetup (~30min), where simply everybody is welcome. There we would just share a little bit about ourselves, my hope would be, that we\r\n\ta) see that there are others that feel similar, and that this already helps\r\n\tb) through knowing there is a repeating meetup, to feel more connected\r\n\tc) that simply people find each other, eg to solder sth, or make a date for visiting some art installation together\r\nAnd if you just like to get to know people, and hang out, here's your warm welcome. \r\n\r\nLooking forward meeting you Timon (muckla)\r\n\r\ncheck again the description, I might update info how to find me",
"schedule_start": "2025-12-29T14:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T14:25:00+01:00"
},
{
"id": "b74b6d5f-17e8-49b9-b0d9-8b09e647c0a0",
"kind": "sos",
"name": "lonely@c3",
"slug": "lonelyc3",
"url": "https://api.events.ccc.de/congress/2025/event/b74b6d5f-17e8-49b9-b0d9-8b09e647c0a0/?format=api",
"track": null,
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"room": null,
"location": "Teehouse",
"language": "de, en",
"description": "I am sitting before the teahose at the table with the high chairs, yellow trouwsers, blue sweatshirt, colorfull scarf, with laptop\r\nplease write me if you cant find me\r\n\r\nHello,\r\nI would like to invite everybody, who suddenly realizes, that they feel a little lonely, although there are so many people around. I believe, especially because there so many, that its natual that loneliness arises. Its now my 5th congress, and although I always found myself in faszinating talks, had really deep philosophical exchanges, and always new impressions, there were many times in which I just felt alone and unconnected. I can imagine, that there are others, who find themselves in similar situations.\r\nTherefore, I want to invite us, to show to each other.\r\nWhat I intend to do is, that we meet every day from day 2 for a meetup (~30min), where simply everybody is welcome. There we would just share a little bit about ourselves, my hope would be, that we\r\n\ta) see that there are others that feel similar, and that this already helps\r\n\tb) through knowing there is a repeating meetup, to feel more connected\r\n\tc) that simply people find each other, eg to solder sth, or make a date for visiting some art installation together\r\nAnd if you just like to get to know people, and hang out, here's your warm welcome\r\n\r\nLooking forward meeting you (muckla)\r\n\r\nSorry, had to change the time on short notice, because otherwise would have went over my own boundaries",
"schedule_start": "2025-12-28T13:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T13:55:00+01:00"
},
{
"id": "b68bc41b-0f54-418d-88e9-4088067c3731",
"kind": "sos",
"name": "Look what I found! OSINT resources in conflicts",
"slug": "look-what-i-found-osint-resources-in-conflicts",
"url": "https://api.events.ccc.de/congress/2025/event/b68bc41b-0f54-418d-88e9-4088067c3731/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "en, de",
"description": "In the context of russia's war of aggression against Ukraine, open-source intelligence (OSINT) plays a significant role in public perception. We will briefly examine some interesting sources and tools and consider what information they make publicly available.\r\n\r\nMaterial from the talk will be published in a few days at https://chaos.social/@uact/115804886087347625",
"schedule_start": "2025-12-29T22:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T22:55:00+01:00"
},
{
"id": "f152ad7d-da6b-4060-a792-1f1862a026d2",
"kind": "sos",
"name": "Löte deinen eigenen Euclidean Sequencer",
"slug": "lote-deinen-eigenen-euclidean-sequencer_lzen",
"url": "https://api.events.ccc.de/congress/2025/event/f152ad7d-da6b-4060-a792-1f1862a026d2/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de, en",
"description": "The Euclidean Sequencer is a hardware gadget developed by students from Cologne. It uses the Euclidean algorithm to find the greatest common divisor of two numbers, thereby creating a sequence. The sequence can be modified using two potentiometers and can be connected to another sequencer or external devices, such as speakers.\r\nWe only have a few solder kits left. Fist come first served!\r\nThe recommended price for the workshop is €30.",
"schedule_start": "2025-12-29T20:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T21:20:00+01:00"
},
{
"id": "5c81806d-e859-4787-a3e9-b44ea7f59d79",
"kind": "sos",
"name": "Löte deinen eigenen Euclidean Sequencer",
"slug": "lote-deinen-eigenen-euclidean-sequencer",
"url": "https://api.events.ccc.de/congress/2025/event/5c81806d-e859-4787-a3e9-b44ea7f59d79/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de, en",
"description": "The Euclidean Sequencer is a hardware gadget developed by students from Cologne. It uses the Euclidean algorithm to find the greatest common divisor of two numbers, thereby creating a sequence. The sequence can be modified using two potentiometers and can be connected to another sequencer or external devices, such as speakers. \r\nJust drop by without registering and bring high-power USB-C power supply, if you have that with you, or even your own soldering iron.\r\nThe recommended price for the workshop is €30.",
"schedule_start": "2025-12-28T20:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T20:50:00+01:00"
},
{
"id": "b0ee474e-87ad-41b2-8e81-044d7a1c2520",
"kind": "sos",
"name": "Lounge Tunes",
"slug": "lounge-tunes",
"url": "https://api.events.ccc.de/congress/2025/event/b0ee474e-87ad-41b2-8e81-044d7a1c2520/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": null,
"description": "Listen to some eclectic lounge tunes with your favorite crew.",
"schedule_start": "2025-12-28T01:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T02:50:00+01:00"
},
{
"id": "d6d7be92-dcd5-4f81-b63d-ec6b2f87ded9",
"kind": "sos",
"name": "Luna Meet-up and Battle to the Death",
"slug": "luna-meet-up-and-battle-to-the-death",
"url": "https://api.events.ccc.de/congress/2025/event/d6d7be92-dcd5-4f81-b63d-ec6b2f87ded9/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "The big rocket at the entrace (the hide and seek will be spread across the venue)",
"language": "en",
"description": "All Lunas are invited!! Non-Lunas attending get to be honorary Lunas.\r\n\r\nWe will settle who the one true Luna is in a game of DECT-enhanced hide and seek across the whole venue :3",
"schedule_start": "2025-12-28T18:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T19:00:00+01:00"
},
{
"id": "5064b9be-3ca1-4142-94ae-0ea56f638075",
"kind": "sos",
"name": "Magician meetup/jam",
"slug": "magician-meetupjam",
"url": "https://api.events.ccc.de/congress/2025/event/5064b9be-3ca1-4142-94ae-0ea56f638075/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Hall 1 Cloak Room foyer next to Komonin | https://39c3.c3nav.de/l/c:1:144.59:175.84/@1,147.18,174.83,4.15",
"language": "en",
"description": "For fellow practitioners of the impossible. Bring your cards, coins, rope or your whatever you're into. \r\n\r\nWe'll share old ideas and maybe contemplate some new ones. All skill levels welcome.",
"schedule_start": "2025-12-28T16:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T17:30:00+01:00"
},
{
"id": "7716bfd9-ac11-49e5-a141-5fc323fbd860",
"kind": "sos",
"name": "Making DIY Stickers",
"slug": "making-diy-stickers",
"url": "https://api.events.ccc.de/congress/2025/event/7716bfd9-ac11-49e5-a141-5fc323fbd860/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Shared Table 2 @ HDGDL Assembly",
"language": "de, en",
"description": "In this session we're making stickers: With pens and sticker paper.\r\nLittle donation for material apprechiated.",
"schedule_start": "2025-12-28T13:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T14:00:00+01:00"
},
{
"id": "97c98b48-530a-4a4c-af6e-ada2be5ed864",
"kind": "sos",
"name": "Malware Analysis and Binary Triage",
"slug": "malware-analysis-and-binary-triage",
"url": "https://api.events.ccc.de/congress/2025/event/97c98b48-530a-4a4c-af6e-ada2be5ed864/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": "de, en",
"description": "Malware Analysis and Binary Triage hands-on workshop/meetup.\r\n\r\nSince the time at the congress is short a bit preparation can help you to speed up getting started and will improve your overall experience.\r\n\r\nPlease bring a laptop with reasonable specs, ideally with:\r\n* VirtualBox\r\n* a Windows VM with disabled MS Defender\r\n* installed Flare-VM (https[:]//github[.]com/mandiant/flare-vm)\r\n* installed IDA-Free (https[:]//hex-rays[.]com/ida-free), Ghidra and cutter (https[:]//cutter[.]re/)\r\n\r\nMake sure to create a first snapshot, before and after installing the FlareVM toolset.\r\n\r\nNo prerequisites are required - everyone is welcome from complete beginners to those with some experience.\r\n\r\nWe also have a discord channel for this event:\r\nhttps[:]//discord[.]gg/QXkEM5G2",
"schedule_start": "2025-12-29T00:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T01:20:00+01:00"
},
{
"id": "576dffcf-fd90-4080-b60c-3c55bcfead77",
"kind": "sos",
"name": "Männerkreis: Wie kann gute Männerarbeit gelingen? [nur Cis Männer]",
"slug": "wie-kann-gute-mannerarbeit-gelingen",
"url": "https://api.events.ccc.de/congress/2025/event/576dffcf-fd90-4080-b60c-3c55bcfead77/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de",
"description": "Männerkreis:\r\nDisclaimer: Dies soll ein Safespace für Cis Männer sein, wir möchten allerdings gerne von FLINTA* Personen lernen, daher findet der gleiche Workshop nochmal als [all Creatures welcome] statt\r\n\r\nIn dem Workshop wollen wir uns zu folgenden Fragen ins Gespräch kommen:\r\n\r\n- Welche Erfahrungen haben wir mit Männerarbeit?\r\n- Wie holen wir uns (auch außerhalb der Bubble) ab? \r\n- Wie schaffen wir es den Bruch zu unseren Schwestern* anzuerkennen und auszuhalten ohne uns dabei zu entmündigen und zu verachten\r\n- Wie schaffen wir es unsere Schutzwalle soweit unten zu lassen, damit wir lernen können, aber trotzdem liebevoll und sorgsam mit uns umzugehen?\r\n- Wie können wir uns trotz unseres internalisiertem Leistungsanspruchs erlauben uns klein, bedürftig und unsicher zu zeigen?\r\n\r\nIch bin Timon (er) von menbracing. Wir sind eine kleine Initiative von Männern die sich inspiriert von der Arbeit von Bell Hooks, Adrienne Maree Brown, Veit Lindau und Anderen an männlicher Care-Arbeit versuchen.\r\n\r\nAnmerkung: Wieso ist der Raum derzeit nicht offen für Trans-Männer?\r\nZuerst Trans-Männer sind Männer!\r\nIch (Timon) hab aber keine Erfahrung in der Arbeit mit Trans-Männern, kann daher nicht einschätzen ob es die soziale Dynamik ändert und ob ich das dann gut moderieren kann. \r\nNachdem aber die Session an Tag 3 ist, bin ich offen für Austausch, schreibt gerne :)",
"schedule_start": "2025-12-29T09:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T10:20:00+01:00"
},
{
"id": "0d3e4059-0c29-42f0-8af4-857e8d927094",
"kind": "sos",
"name": "Marching at KITA (political art - presentation)",
"slug": "marching-ar-kita-political-art-presentation",
"url": "https://api.events.ccc.de/congress/2025/event/0d3e4059-0c29-42f0-8af4-857e8d927094/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
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"language": "en",
"description": "For two years now, children in the public education system of the russian federation are subjected to an unthinkable scale of militaristic indoctrination. Every child takes part in around 70 war-related holidays per year. The more talented ones are involved into propaganda activities to such degree that they have practically no time to study.\r\n\r\nIn this SoS we won't like just to point out that millions of children are being militarized at an unthinkable scale. We also would like to speculate a bit on how and why it is possible that many of you still probably do not know about it.\r\n\r\n---\r\n\r\nTo draw attention to the above-mentioned topic, there will be also a video installation parallel take place at the monument \"Kriegsklotz” not so far from the CCCH ( https://www.openstreetmap.org/?mlat=53.559128&mlon=9.989267&zoom=18 ). The installation will be available during 39C3 every night between 18:00 and 22:00. We recommend taking a look at this installation too.\r\n\r\nSee also: https://chaos.social/@uact/115793315306498503",
"schedule_start": "2025-12-27T21:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T21:55:00+01:00"
},
{
"id": "46b60f80-b129-4a2e-b045-bcdc25407041",
"kind": "sos",
"name": "matcha break from Chaos",
"slug": "matcha-break-from-chaos",
"url": "https://api.events.ccc.de/congress/2025/event/46b60f80-b129-4a2e-b045-bcdc25407041/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "hacksagon",
"language": "de, en",
"description": "It’s chaotic and tiring here, isn’t it?\r\nIf you’d like, you’re welcome to take a quick & quiet break with me. I’ll make a bowl of matcha for you.\r\n\r\n\r\nThis session is run by me alone, and I’m not able to host large groups at once.\r\nFor that reason, the matcha break will take place in a small, quiet space, one-on-one or with a maximum of two people at the same time.\r\n\r\nIf you’d like to join, please send me a DM and let me know when you’d like to come after 16:00.",
"schedule_start": "2025-12-27T16:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-27T17:00:00+01:00"
},
{
"id": "5a2a9411-0169-445c-8edb-26c661af3ace",
"kind": "sos",
"name": "Max8min (Kurzfilm / Short Film) 🍿",
"slug": "max8min-kurzfilm-short-film",
"url": "https://api.events.ccc.de/congress/2025/event/5a2a9411-0169-445c-8edb-26c661af3ace/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de, en",
"description": "We will be watching around 50 minutes of selected short films that are a maximum of 8 minutes long. Many films are either without dialogue or, if necessary, have German subtitles. Do you know a good short film? Then send me the link – maybe there will be a next edition of Max8min 🎦",
"schedule_start": "2025-12-29T22:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T23:20:00+01:00"
},
{
"id": "880ba2e6-27d1-45ec-a8ab-26e091e9215a",
"kind": "sos",
"name": "Mechanical keyboards show and tell",
"slug": "mechanical-keyboards-show-and-tell",
"url": "https://api.events.ccc.de/congress/2025/event/880ba2e6-27d1-45ec-a8ab-26e091e9215a/?format=api",
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"description": "Bring your niche keyboards and show them to everybody interested.",
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"name": "Meet the Funders: Sovereign Tech Agency, NLnet, Prototype Fund",
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"url": "https://api.events.ccc.de/congress/2025/event/0c0f289c-fe72-4c4f-a4d2-0791965703c1/?format=api",
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"description": "Are you looking for funding for your project? Unsure if your new idea would be likely to get support? Interested in applying for a grant, in getting to know who ensures funds run smoothly or simply curious? Come say hi! We're here to answer all your questions about our funds.\r\n\r\nAt this meetup you will have the opportunity to meet team members from the following funds:\r\n\r\nThe Prototype Fund supports software developers, designers and other creatives in transforming their ideas from a concept into a software prototype. Together we explore and test new ways for technical and social innovations as open source software from society and for society.\r\n\r\nNLnet foundation (after its historical contribution to the early internet in Europe) has been financially supporting organizations and people that contribute to an open information society since 1997. It funds those with ideas to fix the internet. The procedure is fast, competitive and open to anyone.\r\n\r\nThe Sovereign Tech Agency supports the development, improvement and maintenance of open digital infrastructure. Our goal is to sustainably strengthen the open source ecosystem. We focus on security, resilience, technological diversity, and the people behind the code.",
"schedule_start": "2025-12-29T14:30:00+01:00",
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"name": "Meetup für Rostock und Umgebung",
"slug": "meetup-fur-rostock-und-umgebung",
"url": "https://api.events.ccc.de/congress/2025/event/3c9e4c4e-178f-4f75-92c1-f98517398c7e/?format=api",
"track": null,
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"location": "Tisch vom Hackspace Rostock im MOiN Habitat",
"language": "de",
"description": "Diese SoS ist ein kleines Meetup für Leute aus Rostock und Umgebung (oder sich dazugehörig fühlend). Wir tauschen uns über Projekte aus und teilen Geschichten.\r\n\r\nFür dieses Meetup muss man nicht Teil vom Hackspace Rostock sein.",
"schedule_start": "2025-12-29T16:30:00+01:00",
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{
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"name": "Meetup: How we move through conflicts - Let's share Community Skills & Resources <3",
"slug": "meetup-how-we-move-through-conflicts-lets-share-co",
"url": "https://api.events.ccc.de/congress/2025/event/65525d74-96d1-42b0-bed1-60d115f30e70/?format=api",
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"location": "laptop free table at komona, next to the infoshop :))",
"language": "de, en",
"description": "Many of our discussions on community skills end up in debates over organisational structures/work and institutionalisation. We would like to talk about the \"soft\" and relational skills we need in order to build resilient communities that can effectively reflect their privileges and move through ideological differences and criticism. \r\n\r\nWe are looking for an exchange and have not planned a presentation. We would love to have an open/lightly structured discussions and inputs from everyone :))",
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"name": "Meet-Up Matrix-Uni-Admins",
"slug": "meet-up-matrix-uni-admins",
"url": "https://api.events.ccc.de/congress/2025/event/d2365de2-419c-40a8-92c7-9907f9b1701c/?format=api",
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"location": "Matrix Community Assembly",
"language": "de, en",
"description": "Do you administrate a Matrix instance at your university, or would you like to start? Then drop by—we’re looking forward to meet you, share experiences, and strengthen the Matrix community across campuses!",
"schedule_start": "2025-12-28T15:00:00+01:00",
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"name": "Meet up on tech transcendentalism and neo feudalism and how to fight it",
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"url": "https://api.events.ccc.de/congress/2025/event/cd97f9d0-f17a-4657-a5ed-8e4b2cccf0b8/?format=api",
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"location": "Komona Infoshop laptop-free table",
"language": "en",
"description": "continuation of talk held at stonewall IO at 4.30 pm today",
"schedule_start": "2025-12-28T21:00:00+01:00",
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"name": "Megastrukturen und Galaktische Imperien (oder: Wie man eine Dyson-Sphäre baut)",
"slug": "megastrukturen-und-galaktische-imperien-oder-wie-m",
"url": "https://api.events.ccc.de/congress/2025/event/19fb99be-9c5e-486c-93e5-2a446e6e6fc8/?format=api",
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"description": "Es geht um große Dinge: Dyson-Sphären und Imperien mit unzähligen Planeten. Wer ist mächtiger? die Föderation der Planeten, das Galaktische Imperium oder ein einzelnes voll ausgebautes Sonnensystem? Anfangs gibt es Raumstationen wie die ISS, dann rotierende Raumkolonien, irgendwann einen Ring um die Erde. Und eine Ringwelt um die Sonne ist erst der Anfang, wenn man eine Dyson-Sphäre bauen will. \r\n\r\nDer mögliche Weg von rotierenden Zylindern zur Kardashev II Zivilisation mit einer ganzen Sonne als Fusionsreaktor. Wie man das baut, was das dann bedeutet und ob man sowas überhaupt braucht. Spoiler: Dyson-Sphären werden unterschätzt. Sie sind größer als man denkt und vieles ist ganz anders, als man aus Science Fiction kennt. Eigentlich können wir mit heutiger Technologie schon einen Dyson-Schwarm bauen. Wir haben sogar schon angefangen. Es ist nur verdammt viel Arbeit für die Bots. Aber dann gibt es fast unendlich viel Lebensraum und noch mehr Compute-Leistung.",
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"name": "Meowing session",
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"url": "https://api.events.ccc.de/congress/2025/event/28f98e0b-e452-4978-9afb-56c4a496ba97/?format=api",
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"location": "Outside Hall 1 between Coffee Nerds and House of Tea - same place as previous years https://39c3.c3nav.de/l/c:3:164.46:146.51/@3,166.33,134.85,3.29",
"language": "en, de",
"description": "We will get together and meow like cats for an undetermined amount of time.\r\n\r\nYou can of course bring your shark!",
"schedule_start": "2025-12-28T16:30:00+01:00",
"schedule_duration": "00:45:00",
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"name": "MeshCore on your WHY2025 badge",
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"url": "https://api.events.ccc.de/congress/2025/event/ebd7e100-ac26-497b-ac36-befef9db3e42/?format=api",
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"location": "HSNL Assembly (Hall 3 foyer, orange table)",
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"description": "I am working on a MeshCore UI for the WHY2025 badge.\r\n\r\nI have just released a very early (unfinished) version and I can help you flash that version.\r\n\r\nThere are also some required hardware mods (bodge wires). For those that don't yet have an antenna on their badge, I have complete kits available (6€).\r\n\r\nMore information: https://peetz0r.nl/badge\r\n\r\nExact location: https://39c3.c3nav.de/l/hsnl/",
"schedule_start": "2025-12-28T15:00:00+01:00",
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{
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"name": "Meshtastic Chaos Creatures (MCC): Channels Distribution Party",
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"url": "https://api.events.ccc.de/congress/2025/event/c3f72a11-3afc-4c61-bb62-01d9a2ee7e50/?format=api",
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"description": "A call of gathering of all creatures with an active Meshtastic node to import a custom-made encrypted chaos channels for communication across the CCC event with all fellow Meshtastic Chaos Creatures.\r\n\r\nAt end of onboarding of the distribution party, written details might will be left at TAMI Assembly table to be picked up by late bloomers (depends on logistics).\r\n\r\n* Any questions you have regarding the recommended preset, configurations and region will be explained during the gathering.\r\n\r\n* This event is self-organized by TAMI Hackerspace community, and is not officiality affiliated with Meshtastic Devs.",
"schedule_start": "2025-12-27T13:00:00+01:00",
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},
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"kind": "sos",
"name": "Microsoldering E-Waste with the UNBRK",
"slug": "microsoldering-e-waste-with-the-unbrk",
"url": "https://api.events.ccc.de/congress/2025/event/964c8753-46d0-4921-b232-8c5a6707585d/?format=api",
"track": null,
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"location": "Near Ewiger Lötworkshop E3, Hall H, Level 0 https://39c3.c3nav.de/l/c:0:102.06:125.86",
"language": "en",
"description": "The UNBRK by Unbinare is a compact breakout board measuring 3.2 x 3.2 cm, designed for rapid prototyping with QFP48, QFP64, QFP100, and QFP144 microcontrollers. This board is part of the Reverse Engineering Toolkit, a collection of open hardware test instrumentation and prototyping tools aimed at minimizing electronic waste.\r\n\r\nIn this session, participants will acquire microsoldering techniques for working with small components, specifically in sizes 0402 and 0201. Each participant will also receive a complimentary kit to practice with.\r\n\r\nWe have about 14 slots available, which will be offered on a first come, first served basis.",
"schedule_start": "2025-12-30T10:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-30T11:30:00+01:00"
},
{
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"kind": "sos",
"name": "Migrantischer Widerstand im Hamburg der 1990er Jahre",
"slug": "anarchismus-heute",
"url": "https://api.events.ccc.de/congress/2025/event/9c68d6a3-979f-4cf2-bb73-3e3554fcdfe0/?format=api",
"track": null,
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"description": "tbd",
"schedule_start": "2025-12-29T14:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T15:50:00+01:00"
},
{
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"kind": "sos",
"name": "💽 MiniDisc Meetup",
"slug": "minidisc-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/97b21bd9-6837-43bd-9648-737900a1ac12/?format=api",
"track": null,
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"location": "KalkSpace assembly (Hall 3)",
"language": "en, de",
"description": "Friends of unnecessarily complicated music media from the 90s - let's have fun with MiniDisc! No matter if you already know the medium or have just heard of it and you're curious - the queen of audio media is as alive as ever, and even though Sony killed the format a long time ago, the community grows a little bigger every day. I'm bringing some of my collection with me and hope you will too!\r\n\r\nWhat could happen here:\r\n- various devices and discs are available to look at and try out\r\n- we can swap or pass on discs and devices\r\n- we can help each other with repairs\r\n- WebMinidisc Pro can be tried out as a modern open-source alternative to recording discs with NetMD devices\r\n- bring your basement or flea market finds and try them out\r\n- listen to music together and talk about it :)\r\n- and a few more collector's items and MD goodies from my collection are also included.\r\n\r\nLocation: KalkSpace assembly (in Hall 3, Chaos-West Habitat)",
"schedule_start": "2025-12-28T15:00:00+01:00",
"schedule_duration": "02:00:00",
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},
{
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"kind": "sos",
"name": "Mocha with Metamours: A World Café on Decoding Ethical Non-Monogamy",
"slug": "mocha-with-metamours-a-world-cafe-on-decoding_gum6",
"url": "https://api.events.ccc.de/congress/2025/event/dc26f79b-96e7-4124-a4a6-36182853e94c/?format=api",
"track": null,
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"description": "Abstract: The world café creates a space for exchanging stories and insights about ethical non-monogamy (ENM) through rotating small-group conversations. Departing from the experiences of everyone in the room, we'll explore the realities of ENM life, learn from each other's stories and questions and decode relationship patterns. The café is primarily for those practicing ENM, regardless: those who are curious/exploring are equally welcome.",
"schedule_start": "2025-12-29T17:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T17:50:00+01:00"
},
{
"id": "05e14097-b55f-41ad-a0b9-d7bccd34fbdb",
"kind": "sos",
"name": "Modern Typesetting and LaTeX Alternative -- Typst Meet-Up",
"slug": "modern-typesetting-and-latex-alternative-typst-mee",
"url": "https://api.events.ccc.de/congress/2025/event/05e14097-b55f-41ad-a0b9-d7bccd34fbdb/?format=api",
"track": null,
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"location": null,
"language": "en, de",
"description": "Are you interested in Typst – the elegant typesetting system and FINALLY a modern alternative to LaTeX?\r\nThen come to our Typst Meet-Up! Whether you already have experience with Typst and want to showcase your own projects or templates, or whether you are completely new and want to get to know the tool – everyone is welcome!\r\n\r\nWhat we want to do and share with you:\r\n- Short introduction and overview for beginners\r\n- Exchange with other Typst users and interested parties \r\n- Presentation of your own projects, templates and tricks at distributed tables\r\n- Open question and answer session\r\n\r\nFeel free to bring your laptop to participate live or present your work. We look forward to exciting discussions and exchanges about Typst!",
"schedule_start": "2025-12-30T12:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T12:55:00+01:00"
},
{
"id": "f5fe567c-7ba8-4529-9f80-812d955f49f9",
"kind": "sos",
"name": "MOVED: Screwdriver Social - Hang out, fix laptops",
"slug": "screwdriver-social-hang-out-fix-laptops",
"url": "https://api.events.ccc.de/congress/2025/event/f5fe567c-7ba8-4529-9f80-812d955f49f9/?format=api",
"track": null,
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"location": "Godot Assembly (@cmacht)",
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"description": "** UPDATE **\r\nWe'll meet at day2@23:00 at Godot Assembly and move to a place with sufficient space and light.\r\n\r\nThrough my volunteer work at Computertruhe e.V. (also present at 39C3), I have a couple of laptops (approx. 30) in undefined condition. Some can be salvaged, some cannot—in any case, it would be very helpful to know what the exact situation is.\r\n\r\nI'll bring laptops, three sets of screwdrivers, and odds and ends; we'll sit down together for a while and tinker.",
"schedule_start": "2025-12-28T23:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T00:00:00+01:00"
},
{
"id": "7a7c1cdf-560b-43f8-ab06-dde2d350bc41",
"kind": "sos",
"name": "MOVED TO hall E FLINTA* CRUISING**💋🌶️🍑👀💦 (*see description; if this sounds appealing to you it’s probably for you) 18+",
"slug": "flinta-cruising-see-description-if-this-sounds-app",
"url": "https://api.events.ccc.de/congress/2025/event/7a7c1cdf-560b-43f8-ab06-dde2d350bc41/?format=api",
"track": null,
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"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
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"description": "**UPDATE SINCE LAST YEAR: clothing MANDATORY!!!!!! NOT a sex party (I have nothing against sex parties but its against CCC rules to organize an SoS session-sex party)\r\n\r\n\r\nWHO IT’S FOR:\r\n\r\n18+\r\nIF YOU CLICKED, THIS IS PROBABLY FOR YOU!!! (like - if you're considering \"hmm am I flinta enough?\" it means you're flinta enough)\r\n\r\neveryone who doesn’t feel at home in straight flirting nor in gay male cruising spaces. Transbians, butch lesbians, bicurious curious “straight” girls, transmascs, “I wish I was trans so I could wear a skirt”-people, those who don’t identify.. etc etc.\r\n\r\nWE DONT ASK, IF YOU WANT TO BELONG, YOU BELONG!!!\r\n\r\nDESCRIPTION:\r\n\r\nEver had the fantasy of silent, sexy encounters with strangers? No strings attached, no complications - just a signal to ask for consent and then you kiss?\r\n\r\nThis is exactly what this is.\r\n\r\nYou are encouraged to explore non verbal interaction, especially since so many of us feel social pressure to be shy, therefore we will use hand signals.\r\n\r\nHOW IT WORKS:\r\n\r\nTO ASK PERMISSION, LOCK EYES+SMILE, MOVE SLOWLY TOWARDS THE PERSON.\r\n\r\nTO SAY YES, meet their eyes, smile back, walk slowly to them also.\r\n\r\nTO SAY NO turn your head away and move a step in a different direction.\r\n\r\nTO ASK FOR A KISS/makeout session, point to your lips.\r\n\r\nTo ask to be touched in any specific area, point to it, or move the persons hand there\r\n\r\nTo say now, or slow things down, take the persons hand and move it away/put it where you would rather have it.\r\n\r\nTo say no mid kiss, put your hand on the person and gently push them away.\r\n\r\nFor this to work, YOU HAVE TO TAKE RESPONSIBILITY FOR YOUR DESIRE. YOU HAVE TO SAY/SHOW NO WHEN YOU’RE NOT INTERESTED\r\n\r\nYou can say no at any time. No strings attached. Don’t worry about disappointing the person.\r\n\r\nThis can only be a safe space to take initiative if we can also trust each other to say no, and ask for what they want.\r\n\r\nLOCATION: SoS Hall 6 \r\nhttps://39c3.c3nav.de/l/sos-6/\r\n\r\nLooking for a hackery person to set up the music tech for mood ambience music in the sound system!!\r\n\r\nAs well input/ideas for music/playlists/genres you think would be nice\r\n\r\nPlease contact me @zackstarkid@kolektiva.social on mastodon. Or toot using the hashtag #flintaparty2 (but pls tag me!)\r\n\r\nWe",
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"schedule_end": "2025-12-30T02:20:00+01:00"
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{
"id": "ececaa0d-4f48-421e-86f9-a473c8769ff0",
"kind": "sos",
"name": "Move your bits Part 2. (Social dancing)",
"slug": "move-your-bits-part-2-social-dancing",
"url": "https://api.events.ccc.de/congress/2025/event/ececaa0d-4f48-421e-86f9-a473c8769ff0/?format=api",
"track": null,
"assembly": "sos",
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"location": "https://39c3.c3nav.de/l/c:2:170.76:134.68/ In Belvedere J4, 2. OG",
"language": "de, en",
"description": "At the beginning, there will be an introduction to some dances\r\n\r\nAfterwards, there will be time for free dancing, improvisation, and participation.\r\n\r\nOpen to everyone - with or without dance experience.",
"schedule_start": "2025-12-29T21:00:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-29T23:00:00+01:00"
},
{
"id": "a7a58387-f9e5-4d98-a023-8a8581e858c8",
"kind": "sos",
"name": "Move your bits Part 3. (Social dancing)",
"slug": "move-your-bits-part-3-social-dancing",
"url": "https://api.events.ccc.de/congress/2025/event/a7a58387-f9e5-4d98-a023-8a8581e858c8/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Fairydust",
"language": "de, en",
"description": "At the beginning, there will be an introduction to some dances.\r\n\r\nAfterwards, there will be time for free dancing, improvisation, and participation.\r\n\r\nOpen to everyone - with or without dance experience.",
"schedule_start": "2025-12-30T13:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T13:25:00+01:00"
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{
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"kind": "sos",
"name": "Move your bits (Social dancing)",
"slug": "move-your-bits-social-dancing",
"url": "https://api.events.ccc.de/congress/2025/event/82a54d11-3139-42a2-8f91-d99f48739771/?format=api",
"track": null,
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"description": "At the beginning, there will be an introduction to one to three dances (choice of: cha-cha-cha, boogie, tourdion, chapelloise).\r\nAfterwards, there will be time for free dancing, improvisation, and participation.\r\nOpen to everyone—with or without dance experience.",
"schedule_start": "2025-12-28T19:00:00+01:00",
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"name": "Mozillians Community Meetup 🦊",
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"location": "Sitting area between Hall Zero and Wine Bar",
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"description": "**Everyone is welcome** \r\n\r\nMeetup for current, former and future community members and enthusiasts.\r\n\r\nWe’re a group of Mozillians attending the congress who’d love to meet up with community members, volunteers and anyone interested in the open internet. Including privacy & security, digital policy, networking and related topics. There’s no formal agenda. This is about connecting, talking about what matters to you, and meeting others in the community. If there’s interest and space, we might do very short, informal lightning talks.\r\n\r\n**What to expect**\r\n\r\nConversations about privacy & security, networking, digital policy, a free and open internet and the like.",
"schedule_start": "2025-12-28T17:35:00+01:00",
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"url": "https://api.events.ccc.de/congress/2025/event/564aa163-91c5-4075-8000-bcf624d2a496/?format=api",
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"description": "Ihr habt Lust auf einen Magic-the-Gathering-Draft bei dem ihr am Ende die Karten behalten dürft, aber trotzdem nichts zahlen müsst? Ihr habt Lust mal mit Karten zu spielen, die ihr wahrscheinlich nicht kennt, auch wenn ihr tief in der Materie seid? Ihr habt Lust auf ein maximal unberechenbares Meta mit Karten, die man sonst nirgends spielt? Ihr wolltet schon immer mal in einer Spielumgebung spielen, in der 5-Color-Badstuff das Deck to Beat sein kann? Dann ist der Bulk-Draft genau das richtige für euch.\r\n\r\nDas ganze ist im MTG-Assembly in Halle H.\r\n\r\nMaximal 8 Plätze, ihr könnt euch auf Spicerack anmelden: https://www.spicerack.gg/events/2841737\r\n\r\nWenn ihr euch nicht extra einen Account klicken wollt (es ist wirklich sehr einfach), dann schreibt mir einfach eine Nachricht im Hub, dann trag ich euch als Gast ein :)\r\n\r\nAußerdem könnt ihr um euch anzumelden auch einfach im Assembly vorbeikommen. Meistens sollte jemand da sein.",
"schedule_start": "2025-12-29T10:00:00+01:00",
"schedule_duration": "04:00:00",
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"description": "Ihr habt Lust auf einen Magic-the-Gathering-Draft bei dem ihr am Ende die Karten behalten dürft, aber trotzdem nichts zahlen müsst? Ihr habt Lust mal mit Karten zu spielen, die ihr wahrscheinlich nicht kennt, auch wenn ihr tief in der Materie seid? Ihr habt Lust auf ein maximal unberechenbares Meta mit Karten, die man sonst nirgends spielt? Ihr wolltet schon immer mal in einer Spielumgebung spielen, in der 5-Color-Badstuff das Deck to Beat sein kann? Dann ist der Bulk-Draft genau das richtige für euch. \r\n\r\nDas ganze ist im MTG-Assembly in Halle H. \r\n\r\nMaximal 8 Plätze, ihr könnt euch auf Spicerack anmelden: https://www.spicerack.gg/events/2837226/\r\n\r\nWenn ihr euch nicht extra einen Account klicken wollt (es ist wirklich sehr einfach), dann schreibt mir einfach eine Nachricht im Hub, dann trag ich euch als Gast ein :)\r\n\r\nAußerdem könnt ihr um euch anzumelden auch einfach im Assembly vorbeikommen. Meistens sollte jemand da sein.\r\n\r\nFalls der vorherige Vintage-Cubedraft länger geht als geplant (https://events.ccc.de/congress/2025/hub/de/event/detail/vintage-cube-draft) kann es sein, dass wir etwas später anfangen. Aber planmäßig ist der um Mitternacht rum (auch wenn was anderes in der Session steht).",
"schedule_start": "2025-12-28T01:00:00+01:00",
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"description": "Lets get together fellow fungi people. Lets talk about growing them at home, identification, using them in projects, nature and more… everyone is welcome - even if you havent started your new hobby yet.",
"schedule_start": "2025-12-29T21:30:00+01:00",
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"name": "MysteryHack Card Scan Exchange",
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"location": "Before Hall Z",
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"description": "Lets scan our collector cards!\r\n:)\r\n- Fabian",
"schedule_start": "2025-12-30T13:00:00+01:00",
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},
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"url": "https://api.events.ccc.de/congress/2025/event/e03b0c7a-1b46-4a3f-92a3-ae5138ad595c/?format=api",
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"description": "Während wir uns auf dem 37C3 noch begeistert Aktionsstrategien der Hongkonger Demokratiebewegung abgeguckt haben, sind mittlerweile eine halbe Million HongkongerInnen ausgewandert, geflohen, oder im Knast. Seit dem Niederschlagen des Aufstands und der Installation des Nationalen Sicherheitsgesetzes hört man aus der Stadt nicht mehr viel. Wer ist da noch? Wie weit ist ein chinesischer Überwachungsstaat installiert? Und wie gehen Menschen mit der neuen Wirklichkeit um? Um diese Fragen zu beantworten, bin ich für ein halbes Jahr nach Hongkong gezogen. Das Buch „nach der Revolte“ (Alibri Verlag, Februar 2026) bietet Einblicke in die politische Gegenwart vor Ort, durch Gespräche mit HongkongerInnen, dem Nachzeichnen der technopolitischen Veränderungen der letzten Jahre, und dem Beschreiben von Alltag in einer Stadt, die so tut, als sei gar nichts passiert. Das Ganze ergibt ein Bild – von Resilienz und Ohnmacht, und von der Fragilität von Systemen, in denen schon ein, zwei Updates reichen, um eine Gesellschaft gänzlich zu ändern.\r\n\r\n„Im Film La Haine wird die Geschichte eines Mannes erzählt, der aus dem 50. Stock fällt und sich dabei immer wieder sagt: Bis hierher lief’s noch ganz gut. Das sind wir, wenn wir denken, dass unsere Gesellschaftsordnung grundsätzlich eine ist, die unsere politischen Freiheiten hält. Das Gegenteil ist der Fall. Nichts an dieser Ordnung schützt sie, außer die temporäre, arrogante Blindheit vor dem eigenen Aufprall.“",
"schedule_start": "2025-12-28T18:00:00+01:00",
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},
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"name": "Nacken Entspannung für Anfänger",
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"track": null,
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"location": "https://39c3.c3nav.de/l/c:2:62.57:185.73/",
"language": "de",
"description": "Hast du Kopfschmerzen? \r\nSitz du öfter wie so jemand: https://says.com/my/_next/image?url=https%3A%2F%2Fmedia.says.com%2F2025%2F05%2F1d40.png&w=1920&q=75\r\n\r\nMachst du generell keinen Sport oder nur sehr wenig?\r\nKannst du nicht gut einschlafen oder \r\nKaust du nachts und hast vielleicht eine Kauschiene? \r\n\r\nIch versuche euch Infos weiter zu gehen wie ihr euch und vor allem eure Bänder eine entspannte Auszeit gönnen könntet :). \r\n\r\nFalls du sagt, ja, ja und fuck Yeeaaaaa. \r\n\r\nKomm vorbei und mach mit (: \r\nhttps://39c3.c3nav.de/l/c:2:62.57:185.73/\r\n\r\nIm Anschluss Austausch zu Erfahrungen mit sowas. \r\nFreu mich auf euch.",
"schedule_start": "2025-12-29T16:00:00+01:00",
"schedule_duration": "00:45:00",
"schedule_end": "2025-12-29T16:45:00+01:00"
},
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"name": "Nail cycles",
"slug": "nail-salon-nagelstudio",
"url": "https://api.events.ccc.de/congress/2025/event/5117a945-c356-4a7b-a1d7-b1537fb8bd85/?format=api",
"track": null,
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"location": "xHain ... Find out XD",
"language": "de, en",
"description": "Hey hey hey, want beautiful nails in Congress style?\r\nAnd even with cute stickers?\r\nPlus 39C3 and other non-permanent tattoos?\r\nFind the xHain Assembly and just help yourselves!\r\nkeine Betreuung!\r\nWenn auf den entsprechenden Tischen etwas im Weg liegt, fragt gern die Wesen in der nähe ganz lieb ob die Sachen beräumt werden können.\r\nSince the bums weren't cheap, donations are welcome <3<3<3",
"schedule_start": "2025-12-29T20:00:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-29T22:00:00+01:00"
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{
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"name": "Nap in the ball pit 🔥",
"slug": "nap-in-the-ball-pit",
"url": "https://api.events.ccc.de/congress/2025/event/04d07b3b-a8d4-46a0-931c-3fd2e1d7f532/?format=api",
"track": null,
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"location": "In the ball pit, Level 0 K7-K8 by the Hall 4 Foyer",
"language": "de, en",
"description": "Getting 8 hours of sleep every day this week is an insurmountable goal akin to Sisyphus pushing his boulder up the hill 💀. To make you all a little less sleep-deprived, you can come join us and take a nap in the comfy ball pit :D\r\n\r\n[Specific map link to the ball pit](https://39c3.c3nav.de/l/baellebad/@0,188.29,184.66,6)",
"schedule_start": "2025-12-29T15:00:00+01:00",
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"schedule_end": "2025-12-29T15:40:00+01:00"
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{
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"name": "Nap in the Ballpit 2: Electric Boogaloo 🔥😤",
"slug": "nap-in-the-ballpit-2-electric-boogaloo",
"url": "https://api.events.ccc.de/congress/2025/event/4f6d3386-8760-4da2-875e-2cbd14cce714/?format=api",
"track": null,
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"language": "de, en",
"description": "DUE TO POPULAR DEMAND (like 4,3 people asked?)\r\n\r\n\r\n\r\n\r\nits back :D\r\nWe will sleep in the ball pit and even though it‘s already quite comfortable as is, we recommend to bring earplugs and/or plushies to reach a new level of elucidation and eudaimonia ✨. We will still let people in for the first 15mins of the event, however please be considerate and try to be quiet when entering.\r\n\r\n[Specific map link to the ball pit](https://39c3.c3nav.de/l/baellebad/@0,188.29,184.66,6)",
"schedule_start": "2025-12-30T12:40:00+01:00",
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},
{
"id": "ccb16a5c-7ff5-42d1-8bdd-d5fef792d1bf",
"kind": "sos",
"name": "(needs to be cancelled, read description, voice gone from AMA, but worth it) Psychedelics - Interdisciplinary Perspectives",
"slug": "psychedelics-interdisciplinary-perspectives",
"url": "https://api.events.ccc.de/congress/2025/event/ccb16a5c-7ff5-42d1-8bdd-d5fef792d1bf/?format=api",
"track": null,
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"location": "Room for up to 100 people? Associated conversations at House of Tea",
"language": "en",
"description": "Let's talk about drugs, honey.. \r\nIn this talk, I want to introduce you to some of the things that really float my boat: Neuroscience (read: the brain as understood through biology and psychology), Psychedelics, and Medicine. Listen, as I aim to connect my studied and experiential expertise to whatever background you may have (no prior knowledge to seasoned psychonaut, and everyone in-between).\r\nGive me a chance to explain what biological cycles our brain run on when high; how the societal stance has come quite a way; where we are with medical access to these tools for the 'Betterment of Well People'; and what I think effective advocacy could look like. Come out, come out, wherever you are..",
"schedule_start": "2025-12-29T15:00:00+01:00",
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"schedule_end": "2025-12-29T16:00:00+01:00"
},
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"name": "NeinZurBezahlkarte Summit",
"slug": "neinzurbezahlkarte-summit_bo8n",
"url": "https://api.events.ccc.de/congress/2025/event/c1cd1cad-a3bc-4c43-8077-fa5b92238869/?format=api",
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"description": "We invite the initiatives organised in the network ‘Equal Social Rights for All’ that have found their way to 39c3 to a networking meeting. \r\nIf you are active in an initiative against the racist AsylbLG, are committed to fighting against the discriminatory payment card, or have already carried out or are planning to carry out exchange campaigns in your local area, you are very welcome to join us – even if you are not yet familiar with the network!",
"schedule_start": "2025-12-30T13:00:00+01:00",
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},
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"name": "🙈 🙉 🙊 Nerd Game Show 😸 😹 😻",
"slug": "nerd-game-show",
"url": "https://api.events.ccc.de/congress/2025/event/a41e6c1b-a057-4204-af66-856241cff20b/?format=api",
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"description": "🙈 🙉 🙊 You Know Stuff ❎ 🆗 ☑️ Answer nerdy questions on your notebook / smartphone and win a (small) price 😸 😹 😻\r\n\r\nhttps://kahoot.it/",
"schedule_start": "2025-12-27T23:00:00+01:00",
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"schedule_end": "2025-12-27T23:50:00+01:00"
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"name": "Neurodivergenz-Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/88d03650-60d9-4e8c-8498-f12eaa10255b/?format=api",
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"description": "Meetup - Revival of 37C3 and 38C3\r\n\r\nWe want to get to know each other (better) and chat about the everyday madness of living in a neurotypical world.\r\n\r\nAnyone who identifies as neurodivergent, particularly those with ADHD and/or autism, is welcome to join us. \r\n\r\nhttps://pads.haecksen.org/l9_SiCHvTNK4Tt-ySUeVVQ?view\r\n\r\nNo official diagnosis is necessary. If you don't have one or are still unsure, you are just as welcome. :-)\r\n\r\nWe'll start by collecting topics and then form discussion groups on these topics at individual tables. It is possible to switch tables during the event.\r\n\r\nFeel free to join us even after the event has started.\r\nThere's no such thing as being late with us, we'll be there until the end of the SOS and are happy to see more of you. <3",
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"location": "Nerdberg (Assembly)",
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"description": "Two of the NewPipe developers are at the conference. We want to organize an open session, where we answer questions, discuss relevant topics and collect feedback. We want to talk about the current and future situation of NewPipe and the NewPipe e.V.",
"schedule_start": "2025-12-29T17:00:00+01:00",
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{
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"kind": "sos",
"name": "Nextcloud Collectives Community Meetup",
"slug": "nextcloud-collectives-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/8ecf2485-3a10-4502-af78-e7d326e177db/?format=api",
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"description": "You use Nextcloud Collectives within a group or plan to do so? Come along and talk with the maintainers and other community members. With Collectives we aim to build a collaborative knowledge database for self-organized and activist groups. Currently we focus on fostering the community and reducing hierarchies between us, the developers and the direct users of Collectives.",
"schedule_start": "2025-12-27T17:00:00+01:00",
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"name": "Nextcloud for Activists Meetup",
"slug": "nextcloud-activist-hostingsupport-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/fb5e2bc8-eba8-436b-a458-ed419459dcbe/?format=api",
"track": null,
"assembly": "sos",
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"language": "de, en",
"description": "We want to exchange with others who support activists with Nextcloud. Come around if you provide Nextcloud hosting for activists and left-wing movements, or if you support them with tech counselling.",
"schedule_start": "2025-12-28T13:00:00+01:00",
"schedule_duration": "00:50:00",
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},
{
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"name": "Noob-Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/5cadeecb-fd6b-4f68-9f78-d92e046432ae/?format=api",
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"assembly": "sos",
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"description": "Du bist auf dem Congress und hast plötzlich das Gefühl, eigentlich viel zu wenig Plan von all den Themen hier zu haben um hier zu sein? Du hast manchmal keinen Plan wovon die Leute eigentlich reden? Du bist nicht unbedingt wegen den IT-Themen hier, sondern vor allem wegen all dem anderen, was hier sonst noch so passiert? \r\n\r\nWenn du irgendeine der Fragen mit ja beantworten kannst, bist du bei dieser Session genau richtig. Nicht großartig moderiert, einfach eine nette Kennenlernveranstaltung.",
"schedule_start": "2025-12-27T12:00:00+01:00",
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},
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"kind": "assembly",
"name": "Numerical Weather Prediction",
"slug": "numerical-weather-prediction",
"url": "https://api.events.ccc.de/congress/2025/event/c46cefe8-5408-434c-9f30-090e290c09e5/?format=api",
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"assembly": "sos",
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"language": "de, en",
"description": "We show how Numerical Weather Prediction works, and which software and data is needed to run your own NWP system.\r\nIMPORTANT\r\n-> to prepare, please clone the repo https://git.hacknology.de/tecer/wrf-docker and follow the instructions to build the docker images wrf and wrfpp and the docker volume. The images are also available on the docker hub registry: \"tcriess/wrf\" and \"tcriess/wrfpp\".",
"schedule_start": "2025-12-29T10:00:00+01:00",
"schedule_duration": "03:00:00",
"schedule_end": "2025-12-29T13:00:00+01:00"
},
{
"id": "968a0546-01a2-4955-b6e1-14e41f4a7000",
"kind": "sos",
"name": "Ohne Jurastudium sich selbst oder andere vor Gericht verteidigen, (wie) geht das?",
"slug": "ohne-jurastudium-sich-selbst-oder-andere-vor-geric",
"url": "https://api.events.ccc.de/congress/2025/event/968a0546-01a2-4955-b6e1-14e41f4a7000/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "next to Pixelebbe (Layer 2, G6)",
"language": null,
"description": "📍 Der Ort dieser Session könnte sich ändern, bitte hier noch mal nachschauen, bevor es losgeht. **Aktuell ist als Ort der freie Platz [neben Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Ebene 2, G6) vorgesehen.** Wir werden nicht viel Platz haben, da wir natürlich keine (Flucht-)Wege belegen möchten.📍\r\n\r\nWorkshop von Personen aus dem gemeinsamen Rechtshilfeteam der Klimaszenen der Städte Augsburg, Ravensburg, Tübingen und Ulm. Wir besprechen den vollständigen Ablauf eines Gerichtsverfahrens, diskutieren Fallstricke und natürlich auch das Für und Wider von Laienverteidigung insgesamt. Herzliche Einladung\r\n\r\nSchwesterworkshop zu der [Session zu aktivistischem Rechtswissen](https://events.ccc.de/congress/2025/hub/en/event/detail/basisworkshop-rechtswissen-fur-aktivismus-versamml). Die beiden Sessions sind inhaltlich unabhängig voneinander, es ist möglich, die eine ohne die andere zu besuchen.\r\n\r\n**[Videos](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-29T13:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T13:50:00+01:00"
},
{
"id": "40f10f20-642c-4dec-81cb-9456e415e09b",
"kind": "sos",
"name": "Omnibus vs. Digitalrechte",
"slug": "omnibus-vs-digitalrechte_6jd6",
"url": "https://api.events.ccc.de/congress/2025/event/40f10f20-642c-4dec-81cb-9456e415e09b/?format=api",
"track": null,
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"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
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"description": "The ‘Digital Omnibus’ is a collection of proposals from the EU Commission to deregulate existing digital laws, which are actually there to protect people. The General Data Protection Regulation (GDPR) and the AI Regulation (AI Act) will be watered down under the pretext of supposed reduction of bureaucracy .\r\n\r\nInstead of helping ‘small and medium-sized enterprises’ or start-ups in Europe, as promised, it is primarily US big tech giants that would benefit, and the European Commission's proposals read like an implementation of the Trump administration's wish list.\r\n\r\nThe session is intended to be a networking meeting for civil society NGOs and individuals to stop the omnibus bill.\r\n\r\nThis session follows a talk on the topic on Day 1, which we therefore recommend:\r\nhttps://events.ccc.de/congress/2025/hub/de/event/detail/throwing-your-rights-under-the-omnibus-how-the-eu-s-reform-agenda-threatens-to-erase-a-decade-of-digital-rights",
"schedule_start": "2025-12-29T12:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T12:55:00+01:00"
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"slug": "om-resonanz-dein-15-minuten-power-cycle-atem-_jiad",
"url": "https://api.events.ccc.de/congress/2025/event/5ca6915e-3d3f-4b7d-adbd-2c30de7e53a9/?format=api",
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"location": "Foyer Y in front of Saal Y",
"language": "en, de",
"description": "This is the second session because some people did not fit in the room and some people wanted to do it again.\r\n\r\nTarget Audience:\r\nOverstimulated brains, conference survivors, and anyone needing 15 minutes of instant clarity.\r\n\r\nFormat:\r\nGuided Micro-Practice (max. 15 minutes, no talking, just doing).\r\n\r\nDetail:\r\nThe C3 is an intense sensory overload. This session provides a fast, scientifically grounded reset. We use sound resonance (the 'Om') not for esoteric purposes, but as a focused breathing tool for immediate activation of the parasympathetic nervous system. Learn how to calm your vagus nerve in under 10 minutes to restore mental clarity and focus. No spiritual content, no prerequisites—just pure pragmatism.",
"schedule_start": "2025-12-29T19:30:00+01:00",
"schedule_duration": "00:20:00",
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{
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"slug": "om-resonanz-dein-15-minuten-power-cycle-atem-hack-",
"url": "https://api.events.ccc.de/congress/2025/event/c27d6ecf-fb3a-4c87-ab67-d228022553ed/?format=api",
"track": null,
"assembly": "sos",
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"language": "de, en",
"description": "Target Audience:\r\nOverstimulated brains, conference survivors, and anyone needing 15 minutes of instant clarity.\r\nFormat:\r\nGuided Micro-Practice (max. 15 minutes, no talking, just doing).\r\nDetail:\r\nThe C3 is an intense sensory overload. This session provides a fast, scientifically grounded reset. We use sound resonance (the 'Om') not for esoteric purposes, but as a focused breathing tool for immediate activation of the parasympathetic nervous system. Learn how to calm your vagus nerve in under 10 minutes to restore mental clarity and focus. No spiritual content, no prerequisites—just pure pragmatism.",
"schedule_start": "2025-12-28T16:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T16:25:00+01:00"
},
{
"id": "315a38c3-f850-4b0c-a922-ed4fdf25b04f",
"kind": "sos",
"name": "OpenMates Dev Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/315a38c3-f850-4b0c-a922-ed4fdf25b04f/?format=api",
"track": null,
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"location": "xHain Assembly (might change later. Check again before the meetup!)",
"language": "en",
"description": "A bit more than a year of work later and OpenMates (a user interests focused open source alternative to AI chatbots like ChatGPT, Claude, Manus, etc.) has developed a lot. Going from early concept to actual working alpha version. Join this meetup if you want to learn and contribute to the development. \r\n\r\nAbout OpenMates: \r\nDon't count on Google Gemini, OpenAI's ChatGPT, Anthropic's Claude or others to prioritize user interests and privacy over profit. Both fascinated by the potential of using AI chatbots as digital team mates for learning and various daily tasks, and also worried about profit-at-all-costs companies shaping this future - I started working about a year ago on OpenMates - a better alternative to those platforms. Better as in: you can choose which model and server provider you want to use, better usability, better apps implementation, better privacy, better functionality overall.\r\n\r\nCurrently in an alpha version online. Be aware: A lot of further improvements and bug fixes will be made in the weeks before the workshop / 39c3.\r\n\r\nGit repo: https://github.com/glowingkitty/OpenMates Website & Web App: https://openmates.org",
"schedule_start": "2025-12-29T16:00:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-29T17:30:00+01:00"
},
{
"id": "f8354017-3aed-4faf-a3c8-1f1516f3f29a",
"kind": "sos",
"name": "Open source hearing technology",
"slug": "open-source-hearing-technology",
"url": "https://api.events.ccc.de/congress/2025/event/f8354017-3aed-4faf-a3c8-1f1516f3f29a/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
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"language": "en",
"description": "The hearing aid space is antiquated and overpriced and badly in need of a widely available and easy to use open source alternative. 5 manufacturers control 99% of the global market, and have little incentive to innovate or compete on prices, so hearing aids cost thousands of Euros. Everyone we meet has either themselves or through a loved one had a bad experience with hearing aids, or experienced quality of life issues with hearing loss.\r\n\r\nWe've been working on making an alternative with our knowledge of professional audio technology, which has long outpaced the medical hearing aid realm. We want to both share the journey, and learn about your experiences both with the technology and hearing itself.",
"schedule_start": "2025-12-28T21:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T21:55:00+01:00"
},
{
"id": "11399a62-d375-430d-b70b-feb76c408483",
"kind": "sos",
"name": "OpenWrt Meetup",
"slug": "openwrt-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/11399a62-d375-430d-b70b-feb76c408483/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en, de",
"description": "Once again this year, the developers and users attending the congress want to discuss current OpenWrt topics.\r\n\r\nSlides: https://docs.google.com/presentation/d/e/2PACX-1vT-p3V616mPtoPuN6OnqFHTRsuaBbl7egMFKLD4hoQ3KOpEqjsR__tnDw4QPcmsYu_OUGkZs4bRbNW1/pub?start=false&loop=false&delayms=10000",
"schedule_start": "2025-12-28T16:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T17:20:00+01:00"
},
{
"id": "bbee9b00-64ba-4011-bccc-8586677f1fb0",
"kind": "sos",
"name": "Operating System Developers (OSdev) / offlinemark Meetup",
"slug": "operating-system-developers-osdev-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/bbee9b00-64ba-4011-bccc-8586677f1fb0/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Near ZeroDay Bar (live updates: offlinemark.com/ccc)",
"language": "en",
"description": "Meetup for anyone interested in os development!\r\n(Or interested in the [offlinemark](https://www.youtube.com/@offlinemark) youtube channel =) )\r\n\r\nWe will try to find a long table to use.\r\n\r\nJoin the Telegram group for live updates: \r\n[https://t.me/+lEXAtJmZm202Mjgy](https://t.me/+lEXAtJmZm202Mjgy)",
"schedule_start": "2025-12-29T16:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T16:50:00+01:00"
},
{
"id": "841bb3ac-d8ff-4286-a6eb-7e91493109cb",
"kind": "sos",
"name": "OSINT with Open Politics - HQ; practical exploration & methods discussion",
"slug": "osint-with-open-politics-hq-practical-exploration-",
"url": "https://api.events.ccc.de/congress/2025/event/841bb3ac-d8ff-4286-a6eb-7e91493109cb/?format=api",
"track": null,
"assembly": "sos",
"room": "72bef980-0733-4a69-abea-770870524413",
"location": null,
"language": "en, de",
"description": "HQ is an open-source stack for annotating data with the help of LLMs. Using schemas written in natural language, items such as news articles or CSVs can be turned into dashboards that are easy to interpret, export, and audit. The aim is to help researchers apply their analytical frameworks to larger datasets with less effort. Because schemas are defined in natural language, the approach is accessible even without programming skills, giving many people a way to extract information directly.\r\n\r\nWhether you are doing keyword labelling, 1–10 rating scales, or graph triplets, the goal is to make it easier to conduct research, gather evidence, or simply organise data. This applies whether you are working with thousands of court documents, news articles, CSV datasets, or photos of receipts.\r\n\r\nMore information and examples: \\\r\nhttps://github.com/open-politics/open-politics-hq \\\r\nhttps://docs.open-politics.org\r\n\r\nThe workshop will focus on presenting existing analyses and developing new ones together. The objective is for participants to gain an understanding of the software and the analytical possibilities it enables. We are also interested in hearing your feature wish-list and, where appropriate, incorporating it into the project roadmap.\r\n\r\nWe will conclude with an overview of our long-term vision, including where the tool is headed and what the next development steps will be.\r\n\r\nP.S.\r\nAlthough our project also involves extensive research on validating and de-biasing LLM-generated labels, this workshop will concentrate on the practical use of HQ. For methodological discussions about robustness, please contact engage@open-politics.org",
"schedule_start": "2025-12-29T18:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T18:50:00+01:00"
},
{
"id": "d5e5240c-955e-4425-92c0-6818a926ad48",
"kind": "sos",
"name": "Outdoors Workout: Let's sport together! Day 2",
"slug": "outdoors-workout-lets-sport-together-day-2",
"url": "https://api.events.ccc.de/congress/2025/event/d5e5240c-955e-4425-92c0-6818a926ad48/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Left of the CCH entry under the roof. Coordinates: 53.56139641288442, 9.98585526310989",
"language": "de, en",
"description": "Working out alone isn't fun. Let's work out together!\r\n\r\nBring your workout clothes, a water bottle, and deodorant, and start your day with a workout! We'll be doing bodyweight exercises, with difficulty levels adjustable from beginner to advanced. Optional: Towel and gloves for those who enjoy mountain climbers in cold weather.\r\n\r\nBeginners are very welcome.\r\n\r\nMeeting point: To the left of the CCH entrance, under the roof. Coordinates: 53.56139641288442, 9.98585526310989",
"schedule_start": "2025-12-28T11:00:00+01:00",
"schedule_duration": "00:30:00",
"schedule_end": "2025-12-28T11:30:00+01:00"
},
{
"id": "f20e0c55-9794-4d61-b00d-c27e5107ffd3",
"kind": "sos",
"name": "Outdoors Workout: Let's sport together! Day 3",
"slug": "outdoors-workout-lets-sport-together-day-3",
"url": "https://api.events.ccc.de/congress/2025/event/f20e0c55-9794-4d61-b00d-c27e5107ffd3/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Left of the CCH entry under the roof. Coordinates: 53.56139641288442, 9.98585526310989",
"language": "de, en",
"description": "Working out alone isn't fun. Let's work out together!\r\n\r\nBring your workout clothes, a water bottle, and deodorant, and start your day with a workout! We'll be doing bodyweight exercises, with difficulty levels adjustable from beginner to advanced. Optional: Towel and gloves for those who enjoy mountain climbers in cold weather.\r\n\r\nBeginners are very welcome.\r\n\r\nMeeting point: To the left of the CCH entrance, under the roof. Coordinates: 53.56139641288442, 9.98585526310989",
"schedule_start": "2025-12-29T11:00:00+01:00",
"schedule_duration": "00:30:00",
"schedule_end": "2025-12-29T11:30:00+01:00"
},
{
"id": "8481edb9-346d-49f8-b9f4-89722f3f99bf",
"kind": "sos",
"name": "Outdoors Workout: Let's sport together! Day 4",
"slug": "outdoors-workout-lets-sport-together-day-4",
"url": "https://api.events.ccc.de/congress/2025/event/8481edb9-346d-49f8-b9f4-89722f3f99bf/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Left of the CCH entry under the roof. Coordinates: 53.56139641288442, 9.98585526310989",
"language": "de, en",
"description": "Working out alone isn't fun. Let's work out together!\r\n\r\nBring your workout clothes, a water bottle, and deodorant, and start your day with a workout! We'll be doing bodyweight exercises, with difficulty levels adjustable from beginner to advanced. Optional: Towel and gloves for those who enjoy mountain climbers in cold weather.\r\n\r\nBeginners are very welcome.\r\n\r\nMeeting point: To the left of the CCH entrance, under the roof. Coordinates: 53.56139641288442, 9.98585526310989",
"schedule_start": "2025-12-30T11:00:00+01:00",
"schedule_duration": "00:30:00",
"schedule_end": "2025-12-30T11:30:00+01:00"
},
{
"id": "6f1a8fc5-1d34-4053-836f-b26ec0c749f6",
"kind": "sos",
"name": "Ozobot-Workshop",
"slug": "ozobot-workshop_2qg3",
"url": "https://api.events.ccc.de/congress/2025/event/6f1a8fc5-1d34-4053-836f-b26ec0c749f6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "c3d2 (ChaosZone)",
"language": "de, en",
"description": "Ozobots are small line followers that are controlled by colour codes. \r\nDraw paths, puzzle paths, solve puzzles – try out everything you can do with Ozobots.\r\n\r\nFor children aged 5–10 and anyone else who is interested.\r\nFree offer with individual instruction.",
"schedule_start": "2025-12-28T14:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T14:25:00+01:00"
},
{
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"kind": "sos",
"name": "People pleasers self-help group discussion",
"slug": "people-pleasers-self-help-group-discussion",
"url": "https://api.events.ccc.de/congress/2025/event/0107062f-4967-4b60-8d73-f7ea8c4c3633/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Next to the Nap Lab on Level 4 https://39c3.c3nav.de/l/c:4:185.66:150.04/",
"language": "en, de",
"description": "\"I set myself on fire to keep other people warm\" is how a friend recently described their past relationships to me. Does this resonate with you? Do you tend to forget about your own needs, because you focus on others a lot?\r\n\r\nAfter a short introduction, we will split into smaller groups, and we will share with each other...\r\n...how you suffer from people pleasing with people close to you\r\n...how you plan to (or have managed to) recover from being a people pleaser to live healthier relationships/friendships\r\n...and, how to prevent falling into old habits again.\r\n\r\nThis session is open to anyone, and I want to especially extend this invitation to you, if you (or your loved ones) suffer from people pleasing.\r\n\r\nThis session is quite long to have enough room for discussions, and, it's also OK for you to leave early.\r\n\r\nI am collecting resources (books, podcasts, blog posts, ...) on the topic of people pleasing. Please send me anything worth looking at, contact info is in my profile.",
"schedule_start": "2025-12-29T18:00:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-29T19:30:00+01:00"
},
{
"id": "5676feac-00d6-466f-b6ce-c682103eaaae",
"kind": "sos",
"name": "Perspektiven auf Männlichkeit - Eine Einladung zur gemeinsamen Betrachtung",
"slug": "maennlichkeit-rg",
"url": "https://api.events.ccc.de/congress/2025/event/5676feac-00d6-466f-b6ce-c682103eaaae/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "de",
"description": "Egal welchen Geschlechts - männliche Sozialisation hat auch heute noch starke Auswirkungen auf unser Leben, Lieben und Zusammensein. Wir wollen gemeinsam auf Männlichkeit blicken;\r\nverstehen, wie sie entsteht, wirkt, erhalten wird und nach einem anderen Umgang mit ihr suchen.",
"schedule_start": "2025-12-28T12:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T12:50:00+01:00"
},
{
"id": "0567e9d8-da4c-466a-afb2-25a8540985ea",
"kind": "sos",
"name": "Physikalische Grundlagen der Klimakrise",
"slug": "physikalische-grundlagen-der-klimakrise",
"url": "https://api.events.ccc.de/congress/2025/event/0567e9d8-da4c-466a-afb2-25a8540985ea/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "next to Pixelebbe (Layer 2, G6)",
"language": "de, en",
"description": "Diese Session ist für dich, wenn du die physikalischen Grundlagen der Klimakrise kennenlernen möchtest, oder dein Wissen auffrischen möchtest.\r\n\r\n📍 The location of this session might change, please check here again before the session starts. **The location is currently set to be [next to Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Layer 2, G6).** We will sit on the floor and won't have much space because we don't want to obstruct escape routes.📍\r\n\r\n* How does CO2 heat the planet?\r\n* How can we learn from earlier changes in the climate?\r\n* What are positive and negative feedback loops in the climate system and why should we care?\r\n* Can a simple mathematical tool, which you can easily apply also to other topics, weigh in on the question whether the current new flooding and heating records are due to changes in the climate or due to mere chance?\r\n* How can we track the origin of CO2 in the atmosphere with a certain radioactive tool?\r\n\r\nWe will also discuss common climate myths and explore in which sense we still have a CO2 budget left.\r\n\r\n**[References](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-29T14:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T14:50:00+01:00"
},
{
"id": "03ab8d1c-1785-4183-a56a-9718a9d06de6",
"kind": "sos",
"name": "Plüschige Katzenohren / Fluffy Catears",
"slug": "pluschige-katzenohren-fluffy-catears",
"url": "https://api.events.ccc.de/congress/2025/event/03ab8d1c-1785-4183-a56a-9718a9d06de6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Treffpunkt: Chaostreff Bonn - Datenburg Assembly",
"language": "de, en",
"description": "We create together fluffy cat ears. If you've got some 3D-printed, feel free to upgrade them with fluffyness. If you've got no own ears, we've got a few for you.\r\n\r\nWe will meet at the Datenburg Assembly and walk together to the location (probably the Haecksen Assembly :) )",
"schedule_start": "2025-12-28T20:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T21:20:00+01:00"
},
{
"id": "6c058338-1818-4b61-a259-e1a81cb9aec6",
"kind": "sos",
"name": "Plushie(-verse) Meetup",
"slug": "plushie-verse-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/6c058338-1818-4b61-a259-e1a81cb9aec6/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "de, en",
"description": "Location and time can still be subject of change :3",
"schedule_start": "2025-12-28T19:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T19:55:00+01:00"
},
{
"id": "1f678886-fbd8-499e-bc1e-c3864bedbbf4",
"kind": "sos",
"name": "Power Play Cycles: Rewriting the Rules of Economic Simulation",
"slug": "power-play-cycles",
"url": "https://api.events.ccc.de/congress/2025/event/1f678886-fbd8-499e-bc1e-c3864bedbbf4/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
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"language": "de",
"description": "What happens when players rewrite the rules of economic simulation games instead of obeying them? By hacking classics like Hammurabi, Oregon Trail, and Lemonade Stand, this talk explores how code, ideology, and play form power cycles—and how breaking them turns market logic into creative resistance. \r\n\r\nhands-on session afterwards (from 5.30pm):\r\nhttps://events.ccc.de/congress/2025/hub/de/event/detail/power-play-cycles-hands-on\r\n\r\nSlides:\r\nhttps://docs.google.com/presentation/d/10aPPQov41A_9ySeQzuhuVZIn4arK4hLiqX6m82OYuRU/edit?usp=sharing\r\n\r\n–\r\n\r\nEconomic power hides in rules. Early home-computer “market simulators” such as Hammurabi, Oregon Trail, and Lemonade Stand encoded entire ideologies of productivity, scarcity, and profit into a few dozen lines of BASIC. They taught us how to play the economy — literally.\r\n\r\nBut what happens when players stop following those rules and begin to rewrite them? This talk explores the power cycles inside these classic games: loops of control between player, program, and system. By modifying code, exploiting glitches, and bending rule sets, we can expose how computational models reproduce economic dogmas—and how small hacks can turn libertarian fantasies into playful counter-economies.\r\n\r\nThrough live demonstrations and short historical dives, we’ll trace how the simple act of “cheating” becomes a tool of critique. Each intervention reveals a new feedback loop between code and ideology: where every CPU cycle becomes a site of political power.\r\n\r\nCan a hacked simulation still be fun? Can rewriting a game’s rules help us imagine different systems of value and exchange? Between nostalgia, code archaeology, and playful subversion, this session invites you to rethink what—and who—games simulate when we let the power cycle run differently.",
"schedule_start": "2025-12-29T17:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T17:50:00+01:00"
},
{
"id": "71b404a9-cdc1-4273-932d-9448022db06a",
"kind": "sos",
"name": "PowerPoint-Karaoke",
"slug": "powerpoint-karaoke",
"url": "https://api.events.ccc.de/congress/2025/event/71b404a9-cdc1-4273-932d-9448022db06a/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Treffpunkt KIF-Assembly",
"language": "de, en",
"description": "We practise competent performance with complete cluelessness and bring a small KIF tradition to Congress. Guaranteed to exercise your laugh muscles!",
"schedule_start": "2025-12-27T18:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-27T19:50:00+01:00"
},
{
"id": "15b7aa12-4742-4427-b3a1-50781987399e",
"kind": "sos",
"name": "Power Zeichnen — Machtdynamiken sichtbar machen.",
"slug": "power-zeichnen-machtdynamiken-sichtbar-machen_wuqf",
"url": "https://api.events.ccc.de/congress/2025/event/15b7aa12-4742-4427-b3a1-50781987399e/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Workshopbus Halle H",
"language": null,
"description": "Zeichnen ist Denken und Sprechen zugleich. Nur mit den Händen. Es hilft uns auch beim Verstehen und Erklären von Machtverhältnissen. Und egal, was uns immer erzählt wurde. Wir alle können zeichnen. Also: Stift raus, Power an – let’s draw!",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "01:30:00",
"schedule_end": "2025-12-28T18:30:00+01:00"
},
{
"id": "523ee7b2-ce00-446e-8a14-479a982e0eb5",
"kind": "sos",
"name": "Präfiguration",
"slug": "prafiguration",
"url": "https://api.events.ccc.de/congress/2025/event/523ee7b2-ce00-446e-8a14-479a982e0eb5/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de, en",
"description": "A session on prefiguration. \r\n\r\nAs a term. \r\nAs a concept. \r\nAs a theory.\r\nAs a practice.\r\nAs an attitude. \r\nAs an emotional mode of life.\r\nAs a method. \r\n\r\nI will tell you about my current activist-research activities and then we can get into discussions about it.\r\n\r\nWhat does prefiguration mean? A few approaches: \r\n\r\n...'a transformative political instrument, [...] [which] aims to establish social relationships, practices and institutions in the here and now that are intended to represent a glimpse of the desired society – among other things, in order to generate motivational effects through exemplarity and to test and practise post-transformative subjectivity.\" (Sörensen 2023, p. 14), from Sörensen, P. (2023). Prefiguration: On the political nature of transformative practice. Campus. \r\n\r\n...“the deliberative experimental implementation of desired future social relations and practices in the here-and-now” (Raekstad & Gradin 2020, p. 10), from Raekstad, P. & Gradin, S. (2020). Prefigurative Politics: Building Tomorrow Today. Polity Press. \r\n\r\n...‘the concept of prefigurations simply refers to the search for ways of anticipating an egalitarian, horizontal society [...] a shared existence in solidarity with living beings without mutual oppression and exploitation’ (Starodub 2025, p. 8), from Starodub, A. (2025). Future Without Borders: History of Ideas and the Present State of Border Demarcation. edition assemblage. \r\n\r\n...'anarchist organizations generally prefigured the future anarchist society in two ways. First, by embodying the kinds of organizational structure and methods of deliberation and decision-making that a future society would contain. Second, by performing the kinds of functions that organizations in a future society will carry out. [...] which was not original or exclusive to the anarchist movement.' (Baker 2023, S. 122-123), aus Baker, Z. (2023). Means and Ends: The Revolutionary Practice of Anarchism in Europe and The United States. ak press.\r\n\r\nTranslated with DeepL.com (free version)",
"schedule_start": "2025-12-27T20:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T21:20:00+01:00"
},
{
"id": "92fda60e-ee15-43f7-9f16-3069adb50756",
"kind": "sos",
"name": "Privacy Ultras Meetup",
"slug": "privacy-ultras-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/92fda60e-ee15-43f7-9f16-3069adb50756/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en",
"description": "If you're trying to raise your privacy / OPSEC in the real and digital worlds to a maximum, this is for you.\r\n\r\nThis is a round-table skill sharing session about practical privacy.\r\nLet's discuss our threat levels (what we're trying to protect against) and share our approaches to preserving our privacy.\r\n\r\nTopics may include how to avoid unique identifiers like your legal or birth name, phone numbers, email addresses, physical (postal) addresses, device identifiers like browser cookies, IP addresses, MAC addresses, anonymous/multiple SIM cards or virtual phone numbers, and all kinds of fingerprinting techniques.\r\n\r\nI will bring a list of topics/threats and we'll discuss our solutions to them. I'm asking to share your tricks, which may include using fake names, P.O. boxes and parcel lockers, actively avoiding cameras, using anonymous phone numbers / SIM cards, VPNs, browser extensions, sandboxing techniques, self hosting, and whatever else. Of course I'll bring my knowledge on this topic as well.\r\n\r\nThe session will not be recorded. Please do not take any photos.",
"schedule_start": "2025-12-28T14:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T15:50:00+01:00"
},
{
"id": "a0b6d7a4-380c-433f-b3b4-c3c9feb05e65",
"kind": "sos",
"name": "Programming Language Design Meetup",
"slug": "programming-language-design",
"url": "https://api.events.ccc.de/congress/2025/event/a0b6d7a4-380c-433f-b3b4-c3c9feb05e65/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Shared Table 12",
"language": "en",
"description": "A meetup for everyone who is interested in the design of programming languages, compiler implementation, and similar.\r\n\r\nIf you have designed your own language and want to show it to people, or just want to talk about interesting ideas for language features, you'll fit right in.\r\n\r\nDECT 4390",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T17:25:00+01:00"
},
{
"id": "1bc0fd0c-7de1-41ee-9169-a02a3b7945c6",
"kind": "sos",
"name": "Prototype Fund & Friends Meetup",
"slug": "prototype-fund-friends-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/1bc0fd0c-7de1-41ee-9169-a02a3b7945c6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Späti",
"language": "de, en",
"description": "We're here to meet our community! Whether you have been funded by Prototype Fund or want to get to know the people behind the fund, come say hi.\r\n\r\n(If you have questions about applying for future funding rounds, please attend our \"Meet the funders\" session: https://events.ccc.de/congress/2025/hub/en/event/detail/meet-the-funders-sovereign-tech-agency-nlnet-proto . Please note that we cannot give any updates on applications submitted in October and November 2025.)\r\n\r\nAbout us: The Prototype Fund is a funding program of the Federal Ministry of Research, Technology and Space (BMFTR) that is managed and evaluated by the Open Knowledge Foundation Germany. Individuals and small teams (of freelance coders, hackers, UX designers and more) can receive funding in order to test their ideas and develop open source applications in the areas of IT Security and Software Infrastructure. We aim to keep innovation processes as well as infrastructures open and accessible.\r\n\r\nAs we were unable to get a room for this year, you'll find us at Späti! If you can't find us, you can contact us at @PrototypeFund@mastodon.social or marie@prototypefund.de.",
"schedule_start": "2025-12-28T15:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T15:50:00+01:00"
},
{
"id": "fd87a52c-abb3-4dce-b860-9262813facac",
"kind": "sos",
"name": "Proving the axioms: the allure of reverse mathematics turning mathematics upside down",
"slug": "proving-the-axioms-the-allure-of-reverse-mathemari",
"url": "https://api.events.ccc.de/congress/2025/event/fd87a52c-abb3-4dce-b860-9262813facac/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "next to Pixelebbe (Layer 2, G6)",
"language": "en",
"description": "📍 The location of this session might change, please check here again before the session starts. **The location is currently set to be [next to Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Layer 2, G6).** We will sit on the floor and won't have much space because we don't want to obstruct escape routes.📍\r\n\r\nStarting from certain base axioms, we prove results. This is how mathematics is usually done. Is there another way?\r\n\r\nIn reverse mathematics, we turn this upside down and instead inquire: Which axioms are required for which results? Perhaps surprisingly, it is possible to answer this question (and prove these answers correct). We can thereby illuminate hidden relations between mathematical theorems and gain a deeper understanding of the mathematical landscape.\r\n\r\nThis talk gives an introduction to reverse mathematics with a focus on examples. It is a beginner's talk aimed at people who are interested in mathematics but have NOT attended reverse mathematics lectures at universities.\r\n\r\nContents:\r\n\r\n1. The foundational crisis which uprooted mathematics at the beginning of the 20th century\r\n2. Overcoming the crisis: formal proofs as gold standard\r\n3. A menagerie of axiomatic systems\r\n4. How results connect with existence principles\r\n\r\n**[Transcript](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-28T15:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T15:50:00+01:00"
},
{
"id": "e24ed287-0453-41dc-8720-44eaf740463d",
"kind": "sos",
"name": "Proxies using MASQUE",
"slug": "proxies-using-masque",
"url": "https://api.events.ccc.de/congress/2025/event/e24ed287-0453-41dc-8720-44eaf740463d/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Shared Table 18, G1 Hall 3, Level 0 https://39c3.c3nav.de/l/c:0:128.24:89.27/",
"language": "en, de",
"description": "MASQUE is an acronym for Multiplexed Application Substrate over QUIC Encryption (masque). This is the name of a IETF working-group which goal is to \"develop mechanism(s) that allow configuring and concurrently running multiple proxied stream- and datagram-based flows inside an HTTP connection.\" https://datatracker.ietf.org/wg/masque/about/\r\n\r\nI'm currently reading into this topic and experimenting a little bit by doing internet measurements using services build with masque.\r\n\r\nWhile many big companies seem to have integrated CONNECT-IP or CONNECT-UDP into their proxy or vpn services, there seem to be not many smaller community projects or discussions about it. \r\nOr maybe i just missed it.\r\n\r\nAre you already using parts of MASQUE? Let's chat about this.\r\n\r\nIf you're interested in this topic but haven't heard of it before, I can give a brief introduction to what MASQUE is.\r\n\r\nI think this topic might not be big enough for a whole SoS room, so i will look out for some space to meet. Maybe even a reservable shared table. Location will be updated during congress.\r\n\r\nIf you want to chat about it but can not participate, you can contact me via matrix chat @jkb:systemli.org\r\n\r\nLOCATION:\r\nShared Table 18\r\nG1 Hall 3, Level 0\r\nhttps://39c3.c3nav.de/l/c:0:128.24:89.27/",
"schedule_start": "2025-12-29T19:30:00+01:00",
"schedule_duration": "00:30:00",
"schedule_end": "2025-12-29T20:00:00+01:00"
},
{
"id": "a877d4c4-bed2-401f-b2f4-b2ac559e8aa3",
"kind": "sos",
"name": "pudding mit gabel essen / eating pudding with a fork",
"slug": "pudding-mit-gabel-essen-eating-pudding-with-a-fork",
"url": "https://api.events.ccc.de/congress/2025/event/a877d4c4-bed2-401f-b2f4-b2ac559e8aa3/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "between House of Tea and Coffee Nerds",
"language": "de, en",
"description": "as the name suggests, we'd like to meet up to eat pudding with a fork, either within or juuuust outside of CCH (whichever is better).\r\n\r\ndon't forget to bring your own pudding* and fork.\r\n\r\n*can also be anything else you like, but it should ideally be relatively similar to pudding in some way ^^;\r\n\r\n(also, sorry for placing this on a day where only the things at the Hauptbahnhof are open :<)",
"schedule_start": "2025-12-28T19:00:00+01:00",
"schedule_duration": "00:30:00",
"schedule_end": "2025-12-28T19:30:00+01:00"
},
{
"id": "a5f3a134-ed30-4072-a938-6cef75d57a7b",
"kind": "sos",
"name": "Pudding mit Stäbchen essen",
"slug": "pudding-mit-stabchen",
"url": "https://api.events.ccc.de/congress/2025/event/a5f3a134-ed30-4072-a938-6cef75d57a7b/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": null,
"description": "You bring the pudding \r\nWe bring the chopsticks",
"schedule_start": "2025-12-27T23:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T00:20:00+01:00"
},
{
"id": "fac2d253-6d42-4d2c-b272-9f32b3e56ea2",
"kind": "sos",
"name": "Puppies/Puppyplayer in ball pit meetup 🐶🐕",
"slug": "puppy",
"url": "https://api.events.ccc.de/congress/2025/event/fac2d253-6d42-4d2c-b272-9f32b3e56ea2/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Bällebad (Erwachsene, Saal 4 Foyer)",
"language": "en, de",
"description": "All puppies/pupplayers and, of course, anyone else who is interested are invited to meet up in/at the ball pit! (if you want in hoods of course!)\r\n\r\nDon't know what pupplay is? Check out https://www.pupplay.de/ and feel free to ask a puppy on site. Insider tip: Bring cookies to make yourself popular! 🍪\r\n\r\nThis will be a rather informal meetup! Come and go as you please!",
"schedule_start": "2025-12-29T19:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T20:00:00+01:00"
},
{
"id": "02570181-ffe0-4c60-9af7-60a48b3008bc",
"kind": "sos",
"name": "Pwn Basics - Hacking Web Applications for Beginners",
"slug": "pwn-basics-hacking-web-applications-for-beginners",
"url": "https://api.events.ccc.de/congress/2025/event/02570181-ffe0-4c60-9af7-60a48b3008bc/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "UPDATE: You can download the workshop slides here: https://janosch-braukmann.de/wordpress/wp-content/uploads/2025/12/39C3_Pwn_Basics.pdf\r\n\r\nThis is a beginners' workshop on web application security. No prerequisites in web application security are required. A certain (web application) development background is beneficial.\r\n\r\nFirst, we will be playing a virtual escape the room game with challenges on a web application to get into an attacker's mindset.\r\nThen follows a quick introduction to the OWASP Top 10 vulnerabilities (2025 Release Candidate).\r\nFinally use the gathered knowledge to attack a vulnerable web application (https://github.com/Phylu/vulnerable-click-game) and see how these attacks can easily be prevented.\r\n\r\nPlease bring your (fully charged) laptop to be able to participate.",
"schedule_start": "2025-12-28T23:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T00:20:00+01:00"
},
{
"id": "6f75e9a7-5ac5-4bd5-9a91-418fd55bb90f",
"kind": "sos",
"name": "Python Programming for Absolute Beginners",
"slug": "python-programming-for-absolute-beginners",
"url": "https://api.events.ccc.de/congress/2025/event/6f75e9a7-5ac5-4bd5-9a91-418fd55bb90f/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": null,
"description": "(While this abstract is in English, this workshop will be held either in English or German; depending on who wants to participate!)\r\n\r\nProgramming is not only a useful competency and oftentimes fun, but also a sort of “cultural technique” of our ever-expanding community. This workshop is intended as a first introduction to (Python) programming for absolute beginners. While C3 is traditionally a 'tech/hacker conference', more and more people without a programming background attend – as far as I'm concerned, this is awesome!\r\n\r\nWhile you certainly don't have to be a 'coder' to be a part of Congress (or to be a hacker), programming is still fun, wonderfully creative, and also an extremely valuable skill. Don't be afraid to give it a go!\r\n\r\nOf course, by the end of this 90-minute workshop, you will not be a programmer. You will, however, have attempted a deep dive into (Python) programming, learned some basics, and set yourself up for further learning (if you choose to do so). Furthermore, we will explore why it is still worthwhile to learn programming in a world that is seeing increased LLM usage – especially in the domain of software development.\r\n\r\n## Target Audience and Required Previous Knowledge\r\n\r\nThis is NOT a session for experienced developers who want to learn Python. This session is intended for beginners with little to no experience programming! Motivated children and young hackers are more than welcome, but it will be a stretch.\r\n\r\nNo previous knowledge and/or technical expertise is required!\r\n\r\n## Learning Objectives\r\n\r\nFrom a learning perspective, after the session, participants will be able to …\r\n\r\n* describe what programming essentially is about.\r\n* name and describe some basic programming terminology.\r\n* define requirements and design simple software.\r\n* model simple problems in terms of data structures and basic algorithms.\r\n* write basic scripts in Python in order to solve specific problems.\r\n* describe the role of LLMs in modern software development.\r\n\r\n## About Me\r\n\r\nMy Name is Ingo, and I am currently responsible for Digital Education and Educational Technology at the University of Cologne. Relevant to this session, I have a background in both education and computational linguistics. My love for Python stems from my work as a (computational) linguist and various projects I've been involved with. :)\r\n\r\n## Format\r\n\r\nThis session will be a 90-minute “code-along” workshop. We will be looking at some fundamental concepts in theory and, together, write some code.\r\n\r\n## Technical Requirements\r\n\r\nIf you want to participate actively (i.e., code along), you should bring a device that is capable of running a modern browser and has Internet access. Being able to type comfortably is also recommended ;). Alternatively, any device capable of running Python 3.10+ (ideally in a Jupyter Notebook) will do just fine!\r\n\r\n## Material\r\n \r\nAfter the session, I will provide all materials, including some selected additional resources. All materials will also be provided via this page.\r\n\r\nThe material, including the slides, is available via [GitHub](https://github.com/IngoKl/39c3-python-programming-for-absolute-beginners).\r\n\r\nPs. This is a slightly updated version of the workshop(s) I gave at previous iterations of congress.",
"schedule_start": "2025-12-29T16:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T17:20:00+01:00"
},
{
"id": "51e412c4-2e17-434c-97a9-3b8ad9f96a58",
"kind": "sos",
"name": "Qubes OS meetup",
"slug": "qubes-os-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/51e412c4-2e17-434c-97a9-3b8ad9f96a58/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "en, de",
"description": "We are a group of Qubes OS users who meet monthly in Berlin.\r\nAt 39c3 we would like to meet other Qubes OS enthusiasts and discuss everything Qubes OS related!\r\n\r\nSome topics for the meeting could be:\r\n\r\n- 2025 in Qubes :D\r\n- Qubes OS 4.3\r\n- Introducing Qubes OS: A beginner’s perspective and a hands-on experience\r\n- Whatever you would like to share and discuss!\r\n\r\nAll creatures welcome <3",
"schedule_start": "2025-12-29T00:30:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T01:50:00+01:00"
},
{
"id": "8f4cef99-652b-427b-a049-24f9bb42ea29",
"kind": "sos",
"name": "Queer Cyberterrorism Meetup",
"slug": "queer-cyberterrorism-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/8f4cef99-652b-427b-a049-24f9bb42ea29/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "House of Tea",
"language": "en",
"description": "Let's discuss hacktivism, hacktivism-adjacent topics, hacks and leaks, how to do various types of anarchism with a computer, ethical irresponsible non-disclosure, hacking for fun, and any other black hat related shenanigans. \r\n\r\nA hopefully safe space for aspiring threat actors and threat actresses to hang out and drink tea. \"Queer\" is just a vibe check.\r\n\r\nNot a place to discuss WikiLeaks or WikiLeaks-related topics as this subject has been covered to death at previous congresses. Let's shift our attention to folks still doing meaningful work instead.",
"schedule_start": "2025-12-28T21:00:00+01:00",
"schedule_duration": "00:55:00",
"schedule_end": "2025-12-28T21:55:00+01:00"
},
{
"id": "cdb9c886-f89f-4f89-8964-c3ccc497218e",
"kind": "sos",
"name": "Queer*IT Gathering 🌈",
"slug": "queerit-gathering",
"url": "https://api.events.ccc.de/congress/2025/event/cdb9c886-f89f-4f89-8964-c3ccc497218e/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
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"language": "de",
"description": "We would like to invite all queer individuals interested in queer digital infrastructure (\"it by us for us as queers\") to meet with us and build a collective/community.\r\n\r\nWhether you develop software solutions, design IT infrastructure, or are simply looking for technical solutions that are suitable for us as queers and that we can trust—you are very welcome 💖!\r\n\r\nEven if you just want to meet other queer people at the Congress, feel free to come by.\r\n\r\n🏳️🌈🏳️⚧️\r\n\r\n“We” are the loose collective [queerit.org](https://queerit.org), the [Digital Empowerment Project by Local IT](https://digitalempowermentproject.de/) together with the [\"queersupport\" of the youth network Lambda](https://queersupport.de).\r\n\r\nLet's build on what we already discussed as QueerIT at the Chaos Feminist Convention (you can see what that was [here](https://queerit.org/queer-it-auf-der-chaos-feminist-convention/)) and form alliances.\r\n\r\nWe look forward to seeing you!\r\n\r\n🏳️🌈🏳️⚧️",
"schedule_start": "2025-12-28T15:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T15:50:00+01:00"
},
{
"id": "0fe83223-da78-4f87-b747-c44028b31a5e",
"kind": "sos",
"name": "Radio FoxHunt / Transmitter hunt (new frequency!)",
"slug": "radio-foxhunt-transmitter-hunt",
"url": "https://api.events.ccc.de/congress/2025/event/0fe83223-da78-4f87-b747-c44028b31a5e/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "you find it :D",
"language": "en",
"description": "a signal will be transmitted from a hidden location, your task is to locate the source. If you find it, a prize will await you\r\n\r\nsignal specs:\r\n\r\nmodulation: cw \\\r\nfrequency: 867.900000 MHz \\\r\nperiod: 1000ms \\\r\npower: <14dBm \\\r\nantenna: very inefficient flexy\r\n\r\ncheck this telegram chat if you need help! https://t.me/escradiolounge\r\n\r\nif you find it and nobody is around, send me a dm on this account or join the telegram chat",
"schedule_start": "2025-12-29T11:00:00+01:00",
"schedule_duration": "16:40:00",
"schedule_end": "2025-12-30T03:40:00+01:00"
},
{
"id": "3722e377-355d-4e35-8255-4a1b43b91532",
"kind": "sos",
"name": "Raphson music player (Demo)",
"slug": "raphson-music-player-demo",
"url": "https://api.events.ccc.de/congress/2025/event/3722e377-355d-4e35-8255-4a1b43b91532/?format=api",
"track": null,
"assembly": "sos",
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"language": "en",
"description": "Web-based self-hosted social music player for parties or social spaces.\r\n\r\nWhat makes this different from other music players? It is designed around listening with groups. Instead of playing a single playlist, this music player allows enabling many playlists from different people. Tracks are shuffled from multiple playlists into a single queue. No more arguing about which music to play, everyone's music get played.\r\n\r\nAn additional benefit of this is music discovery; even when you're listening solo you might like to mix up your own music with someone else's.",
"schedule_start": "2025-12-30T13:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T13:25:00+01:00"
},
{
"id": "0c4f3f27-e074-4c4f-84b4-9d5706787614",
"kind": "sos",
"name": "Rationalitiy/LessWrong/ACX/Slate Star Codex",
"slug": "rationalitiylesswrongacxslate-star-codex",
"url": "https://api.events.ccc.de/congress/2025/event/0c4f3f27-e074-4c4f-84b4-9d5706787614/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "hall 3 foyer chillout platform https://39c3.c3nav.de/l/c:0:157.14:158.05/",
"language": "en",
"description": "",
"schedule_start": "2025-12-27T18:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T18:50:00+01:00"
},
{
"id": "6b7789f4-e1e1-415e-901b-758b0b9a10df",
"kind": "sos",
"name": "RAYHUNTER: Let's hunt Stingrays - Community Meetup",
"slug": "rayhunter-orcas-hunt-stingrays-community-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/6b7789f4-e1e1-415e-901b-758b0b9a10df/?format=api",
"track": null,
"assembly": "sos",
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"language": "en, de",
"description": "Rayhunter is a new open source tool from the EFF to detect cellular spying.\r\n\r\nYou install Rayhunter on a LTE pocket router to detect suspicious activity from IMSI catchers (aka. Stingray) in your vicinity.\r\n\r\nIn this session we want to install Rayhunter, talk about what it does and why it is useful, what possible use cases are and how future development might look like.\r\n\r\nEveryone is welcome, no special knowledge or skills are needed.\r\n\r\nIf you can please bring along the following items\r\n\r\n* your laptop (Linux, MacOS, Windows)\r\n* a (fully charged) TP-Link M7350 portable LTE router (some other models are also supported by Rayhunter, but this is the one I tested)\r\n* a Micro-SD card (32 GB is ok)\r\n* a SIM card (e.g. a prepaid SIM from your local supermarket - you may want to activate it but it is not strictly needed, nano-SIM form factor needed) \r\n* a USB-C cable that can connect to your laptop\r\n* installer files for your OS version\r\n\r\nYou can find the TP-Link M7350 used on eBay or new on Amazon for ~45 EUR\r\nhttps://amzn.eu/d/6YUbV1b\r\nhttps://www.tp-link.com/de/home-networking/mifi/m7350/\r\n\r\nFor background information:\r\nhttps://www.eff.org/deeplinks/2025/03/meet-rayhunter-new-open-source-tool-eff-detect-cellular-spying\r\n\r\nGitHub repository and release files:\r\nhttps://github.com/EFForg/rayhunter\r\n\r\nEuropean community around TP-Link M7350:\r\nhttps://github.com/m0veax/tplink_m7350\r\n\r\nPlease note that this is not an \"official\" EFF event.",
"schedule_start": "2025-12-28T19:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T19:50:00+01:00"
},
{
"id": "e2d88fda-f059-4fde-9f4a-9b1937e6b14c",
"kind": "sos",
"name": "Realismus beim SF Weltenbau: Was wir aus der Geschichte über die SF-Zukunft lernen können",
"slug": "realismus-beim-sf-weltenbau-was-wir-aus-der-geschi",
"url": "https://api.events.ccc.de/congress/2025/event/e2d88fda-f059-4fde-9f4a-9b1937e6b14c/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
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"language": "de",
"description": "So wie das Fantasy-Genre oft das Mittelalter abbildet und weiterdenkt, kann man sich auch in der Science Fiction an der realen Geschichte orientieren, vor allem dann, wenn sie realistisch sein soll. Das gilt natürlich auch für Fantasy Weltenbau.\r\n\r\nThemen:\r\nWie man Technologie entwickelt: z.B. FTL\r\nAlles immer größer & teurer? oder kleiner?\r\nInseln und Entdecker\r\nDie Größe der bekannten Welt: Reisen und Nachrichten\r\nVon Vögeln und schwarzen Löchern\r\nWer bezahlt?\r\nGeografie rulez\r\n\r\nWie entstehen neue Technologien? Wie sind sie früher entstanden? Wird alles immer größer, oder auch einmal kleiner und effizienter? Wie entwickeln sich Gesellschaften und Konflikte? Welche wirtschaftlichen und infrastrukturellen Voraussetzungen braucht es, um kilometergroße Battleships zu bauen? Wie viele Menschen passen eigentlich auf die Erde? Was bedeutet Postapokalypse im historischen Kontext? Warum sollten wir das Sonnensystem besiedeln und Planeten terraformen? Falls es Aliens gibt, sind wir dann Forscher, Siedler und Eroberer? Oder sind wir eher die Eroberten, wie einst die Bewohner der Pazifikinseln?\r\n\r\nViel Material für eine realistische Geschichte der Zukunft, basierend auf realer Wissenschaft und historischen Mustern.",
"schedule_start": "2025-12-30T13:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T13:50:00+01:00"
},
{
"id": "395d4535-2a59-4373-8b23-f64c27f87f8a",
"kind": "sos",
"name": "Red teams in military operations",
"slug": "collaboration-with-red-teams-in-military-operation",
"url": "https://api.events.ccc.de/congress/2025/event/395d4535-2a59-4373-8b23-f64c27f87f8a/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "Gathering, orchestrating and dissipating data during specific operations.\r\n\r\nSpeaker: Anton Tseholnyk, AFU OSINT team",
"schedule_start": "2025-12-27T22:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T22:25:00+01:00"
},
{
"id": "c20cbaea-51ca-462f-a058-af7d39473d29",
"kind": "sos",
"name": "Reform des Nachrichtendienstrechts: Austausch über präventive Schutzkonzepte für hochgefährdete Personen",
"slug": "reform-des-nachrichtendienstrechts-austausch-uber-",
"url": "https://api.events.ccc.de/congress/2025/event/c20cbaea-51ca-462f-a058-af7d39473d29/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "de",
"description": "Die deutsche Bundesregierung plant aktuell die Reform des Nachrichtendienstrechts. Was bei der medialen Aufregung oft unerwähnt bleibt: Die neuen Regelungen spielen mit Feuer mit Leib und Leben höchstgefährdeter Personen. \r\n\r\nDas Problem: Ein ex post Rechtsschutz kommt meistens zu spät, nachdem der gravierende Schaden bereits eingetreten ist. Das bedeutet, der Schadensfall muss bereits ex ante durch präventive Schutzkonzepte und Handlungsvorschläge möglichst verhindert werden. \r\n\r\nIn einer Austauschsession soll besprochen werden, wie mögliche Handlungsvorschläge, Standards und policy-Entwürfe für ex ante Schutzkonzepte und möglichst effizienten Rechtsschutz im Eilfall entwickelt und verbreitet werden können. Zielgruppe sind nicht nur Jurist:innen, sondern insbesondere auch gefährdete Personen und solche, die mit ihnen zusammenarbeiten (insb. Journalist:innen, Anwält:innen, etc).\r\n\r\nDie Organisationskreatur ist Jurastudi in Examensvorbereitung.",
"schedule_start": "2025-12-29T23:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T23:55:00+01:00"
},
{
"id": "7310fde2-79ec-43bb-b5c6-219f3ce5b2f6",
"kind": "sos",
"name": "Regiotreffen",
"slug": "regiotreffen",
"url": "https://api.events.ccc.de/congress/2025/event/7310fde2-79ec-43bb-b5c6-219f3ce5b2f6/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "Regiotreffen auf dem 39c3. Das Treffen aller Regiovertreter*innen.",
"schedule_start": "2025-12-29T14:30:00+01:00",
"schedule_duration": "01:25:00",
"schedule_end": "2025-12-29T15:55:00+01:00"
},
{
"id": "cd624c60-a299-4fb1-8108-7f68e1d96073",
"kind": "sos",
"name": "Relation Anarchy and Solo-Poly meet-up.",
"slug": "relation-anarchy-and-solo-poly-meet-up_d41j",
"url": "https://api.events.ccc.de/congress/2025/event/cd624c60-a299-4fb1-8108-7f68e1d96073/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": null,
"description": "Abstract: Meet up for those identifying as solo-poly or relationship anarchist, to meet and share experiences.\r\n\r\nDescription: A meetup for those who identify as Relationship Anarchist or Solo Poly, we like to share experiences and thoughts that we run into within these contexts.\r\n\r\nIf you identify as a Relationship anarchist or as Solo Polo, even if you're not in such a relationship now or have been. We want to share out experiences and thoughts on the topic, but it's not an introduction",
"schedule_start": "2025-12-30T15:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T15:50:00+01:00"
},
{
"id": "f1417f1a-9b59-45ef-a8a3-ec86a5083638",
"kind": "sos",
"name": "Relationship Anarchy and Technologies of Connection",
"slug": "relationship-anarchy-and-technologies-of-conn_x57l",
"url": "https://api.events.ccc.de/congress/2025/event/f1417f1a-9b59-45ef-a8a3-ec86a5083638/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "en",
"description": "Abstract: Relationship Anarchy is a guiding principle that hold the promise for us to prefigure the future. This session will start off by defining Relationship Anarchy. It will then nest this definition in the context of our current situation (socially, politically, technologically). Finally, we will look at technologies in a wider sense and investigate whether they are nurturing or hostile towards the prefiguration of Relationship Anarchy.\r\n\r\nDescription: Relationship Anarchy is a form of livable anarchy. It follows in the steps of anarchy, in that it rejects illegitimate authority and nurtures personal and collective autonomy and agency. Livable anarchy opens up the public space for folx to participate actively in shaping how they wish to live and self-represent their desire and identity. It is rooted in solidarity and a respectful attitude towards otherness. \r\n\r\nIn this talk, we explore the ways in which technology shapes our ability to practice Relationship Anarchy, as a form of livable anarchy. We start off by acknowledging that our use of technology shapes what we can do, perceive and imagine. In this sense, we can categorize technologies, in a broad sense, as either hostile towards Relationship Anarchy, or as nurturing towards it. \r\n\r\nThe basis of this discussion is going to be a definition of Relationship Anarchy that catileptic, the speaker, offers in their writing: \"Relationship Anarchy is honoring alterity while making one's self subject to others\".\r\n\r\nThis presentation is loosely based on this essay: https://catileptic.tech/posts/relationship-anarchy-technology/ .",
"schedule_start": "2025-12-29T12:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T12:50:00+01:00"
},
{
"id": "b5e583f3-bdb0-47c1-8a90-a7e3063e92a3",
"kind": "sos",
"name": "Renewable Power Cycles - Patching Democracy",
"slug": "renewable-power-cycles-patching-parlamentarische-d",
"url": "https://api.events.ccc.de/congress/2025/event/b5e583f3-bdb0-47c1-8a90-a7e3063e92a3/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "de",
"description": "How can we work together to improve political decision-making processes in the long term? What do you want from democracy?\r\n\r\nMotivation:\r\nWhile our democracy can be shaped by the people as they wish on paper, the population seems to be largely dissatisfied with political actions:\r\n- The handling of many crises appears to be inadequate\r\n- Urgent problems seem to be postponed\r\n- Democratic participation seems tedious and ineffective\r\n\r\nWe would like to work together to find ways to improve, that can be implemented within the framework of our existing political system.\r\n\r\nProcedure:\r\n- 15 min. presentation on motivation and information\r\n- 35 min. bug fixing - Moderated discussion round to jointly develop solutions",
"schedule_start": "2025-12-27T11:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T11:50:00+01:00"
},
{
"id": "9ecdb420-14a8-45b8-9775-9706e1547ce5",
"kind": "sos",
"name": "Repressions and Surveillance of Pro-Palestine Speech in Germany",
"slug": "repressions-and-surveillance-of-pro-palestine-spee",
"url": "https://api.events.ccc.de/congress/2025/event/9ecdb420-14a8-45b8-9775-9706e1547ce5/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "Over the last two years, Germany has engaged in systematic repression of Pro-Palestine speech within its borders, including home raids for online speech, border interrogations and device searches, spurious criminal charges, and arrests at protests for speech acts - often accompanied by disproportionate use of force.\r\n\r\nSocial media monitoring, as well as video surveillance of association and expression at protests play an important and ongoing role, that becomes more problematic with the passage of Berlin's updated policing law providing for longer administrative detention, geofence warrants, and the expanded use of facial recognition in public spaces. \r\n\r\nIn this talk we briefly summarize events occurring in Berlin and Frankfurt over the last two years as they pertain to digital surveillance and repression. Amnesty and Civicus Monitor have spoken out about Germany's repressions in this area, and the latter has downgraded its rating for Freedom of Expression accordingly.\r\n\r\nCome to find out what you can do to help push back against unconstitutional repressions of speech in Germany, and the role that NGOs and people with technical skills can play.",
"schedule_start": "2025-12-29T12:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T12:25:00+01:00"
},
{
"id": "c48308f9-93c3-4d50-9926-70028f841aa0",
"kind": "sos",
"name": "Rereading the Cards. What in God*ess' Name is Queerfeminist Tarot?",
"slug": "rereading-the-cards-what-in-godess-name-is-queerfe",
"url": "https://api.events.ccc.de/congress/2025/event/c48308f9-93c3-4d50-9926-70028f841aa0/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Workshop will take place at shared table 14 in Saal 3 Foyer https://39c3.c3nav.de/l/c:0:160.42:141.12/@0,160.79,142.16,6",
"language": "en, de",
"description": "Esoteric practices and Tarot-Cards specifically are widely popular among people who identify as leftist and/or queer-feminist. This might seem surprising at first glance, there being a long tradition of crititque of superstition and esoterics in leftist theory, starting with the enlightment and continuing for example in Adornos \"The Stars down to Earth\" where occultism is linked to fascism and antisemitism. Yet in the wake of 1968 esoteric practices have played a huge role in the counterculture movements and some of them have linked themselves explicitly to the project of an emancipatory Tarot, either by questioning the Tarots assumptions of gender-roles, changing the imagery or including Tarot reading into radical practice. We want to trace back this history and discuss virtues and pitfalls of these approaches. Most of all we want to hear your arguments and intuitions about Tarot in an emancipatory context. We'll also bring some examples from our collection of tarot decks to peruse. Actual Tarot reading might occur but is not really the subject of this session.\r\nmax 10 Participants\r\n*edit 2025-01-10* \r\nYou will find the materials we talked about to download under this link until end of January: https://theomorphia.twilightparadox.com/index.php/s/gs8fyi99Tqfkmt9\r\nAlso the Tarot Wiki we couldn't remember the name of ist: https://www.aeclectic.net/tarot/cards/list.shtml",
"schedule_start": "2025-12-28T13:00:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-28T15:00:00+01:00"
},
{
"id": "2673fcdf-7326-4ec1-99db-1fd2c03f18c5",
"kind": "sos",
"name": "Reticulum Workshop #1: Low-profile and low-energy autonomous networking over TCP/IP, LoRa and Bluetooth Low Energy",
"slug": "reticulum-workshop-1-low-profile-and-low-energy-au",
"url": "https://api.events.ccc.de/congress/2025/event/2673fcdf-7326-4ec1-99db-1fd2c03f18c5/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Moved under the escelators here (search for \"Cubetopia on a projector\" on the map) https://39c3.c3nav.de/l/c:0:179.47:174.36/",
"language": "en",
"description": "Running your own communications infrastructure has obvious benefits. We live in a world of increasing digital censorship, and are rarely completely in charge of our communications. Even if we choose to use \"better\" alternatives to WhatsApp, Instagram, etc., we are still always completely reliant on the one underlying network, i.e. \"The Internet\". With the push of a button, \"The Internet\" may all of a sudden become unavailable. In places with oppressive regimes, this has not been uncommon. In the current political climate, it would not be surprising if any political system all of a sudden became repressive.\r\n\r\nNatural disasters are another very important reason to have ways of communicating with each other. As we saw recently in the floods in Valencia, when disaster strikes, there are no more communication networks for civilians. It is obvious that it is crucial to be able to communicate with your peers when in an emergency: both for moral support; and to increase the safety and chances of survival.\r\n\r\nIn this workshop, we will explore the possibilities for setting up a decentralized off grid communications system using the Reticulum communication protocol stack. We choose to focus on Reticulum because it is designed for heterogeneous networks built from various cheap devices, to be deployed in a bottom up way by small communities. More information is found here: https://reticulum.network/\r\n\r\nThe mesh network stack runs on various platforms. You can run it on your desktop, your home server, your mobile phone. In the workshop, we will focus on building some standalone nodes, based on a low power ARM board, that you can connect to your local network, to be able to communicate with your peers.\r\n\r\nIt can run on top of a wide variety of transport layers. It can run on normal IPv4 networks. However, for us the interesting part is that it also runs on high latency, low bandwidth radio links. These can be Internet of Things networks like LoRa, or packet radio systems using cheap handheld VHF radios. (One such radio is the infamous programmable Baofeng UV-5R.)\r\n\r\nWe will look at some applications that were build on top of the Reticulum communication protocol stack. There is a simple graphical chat application called Meshchat (https://github.com/markqvist/reticulum-meshchat) that can be run locally on your computer. There is also a BBS style forum implementation, called Nomadnet (https://github.com/markqvist/NomadNet) Finally, there are Android mobile phone apps called Sideband (https://github.com/markqvist/Sideband) and Columba (https://github.com/torlando-tech/columba)",
"schedule_start": "2025-12-28T15:00:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-28T17:00:00+01:00"
},
{
"id": "cd40b943-e8e3-4ad7-b681-cf02480d5fe7",
"kind": "sos",
"name": "Reticulum Workshop #2: Low-profile and low-energy autonomous networking over packet radio using Software Defined Radios",
"slug": "reticulum-workshop-2-low-profile-and-low-energy-au",
"url": "https://api.events.ccc.de/congress/2025/event/cd40b943-e8e3-4ad7-b681-cf02480d5fe7/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Moved under the escelators here (search for \"Cubetopia on a projector\" on the map) https://39c3.c3nav.de/l/c:0:179.47:174.36/",
"language": "en",
"description": "This work session is about running the Reticulum protocol over packet radio using Software Defined Radios. The setup allows linking local networks and contexts over long-distance radio links. There are people from several local Reticulum networks at 39C3 and it would be great to figure out how to connect those networks over autonomous links!\r\n\r\nNo prior knowledge required. We do not have the solution at hand and plan to put our heads together to make this happen. There is some basic knowledge and equipment available but more is always welcome.\r\n\r\nSee the description of the previous workshop about an introduction to Reticulum: https://events.ccc.de/congress/2025/hub/en/event/detail/reticulum-workshop-1-low-profile-and-low-energy-au",
"schedule_start": "2025-12-29T15:00:00+01:00",
"schedule_duration": "02:00:00",
"schedule_end": "2025-12-29T17:00:00+01:00"
},
{
"id": "f9eed863-ba03-4d4d-9e6d-3d674729c9a6",
"kind": "sos",
"name": "Reticulum workshop #3: Politics of the Reticulum Ecosystem",
"slug": "reticulum-workshop-3-politics-of-the-reticulum-eco",
"url": "https://api.events.ccc.de/congress/2025/event/f9eed863-ba03-4d4d-9e6d-3d674729c9a6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "CDC Circle",
"language": "en",
"description": "Which are the political choices and fault lines in the technology and the community around it? What are the consequences? How to improve the situation? Can we find a normative common ground? Is that necessary? If so, why?",
"schedule_start": "2025-12-30T15:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-30T16:00:00+01:00"
},
{
"id": "8d0965e8-7e53-464c-a5b5-aa23136dbcd3",
"kind": "sos",
"name": "Retro Online Gaming - Mit alten Consolen Online spielen",
"slug": "retro-online-gaming-mit-alten-consolen-online-spie",
"url": "https://api.events.ccc.de/congress/2025/event/8d0965e8-7e53-464c-a5b5-aa23136dbcd3/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "team23 assembly",
"language": "de, en",
"description": "Old gaming consoles may have lost support for the vendor supplied official online gaming. But they are not dead yet. In this session, I will explain how to bring systems back online using community driven project / servers.\r\n\r\nThe following systems will be covered:\r\n- Nintendo DSI\r\n- Sega Dreamcast\r\n- Nintendo Wii und Wii U\r\n- Original Xbox\r\n\r\nContact: waffle.ratters_9w@icloud.com\r\nFor many of these systems, there is also an active community with news and online events.\r\n\r\nLet's the games begin :)\r\n\r\nPS: If you bring your Wii, DSi oder OG Xbox, I may be able to help you with getting things set up. For the OG Xbox please give me a heads-up.",
"schedule_start": "2025-12-28T19:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T20:00:00+01:00"
},
{
"id": "9c894308-6284-4259-b861-504bad08fab6",
"kind": "sos",
"name": "Roller Derby Meetup",
"slug": "roller-derby-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/9c894308-6284-4259-b861-504bad08fab6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "foyer, meet by the fairy dust",
"language": "en, de",
"description": "A Meetup for everyone involved in Roller Derby.\r\n\r\nSignal: https://signal.group/#CjQKIJat9g9HqufGMVk_QWQWiuamnOSAGl_QtZDCBpC82lhHEhCo4YRcXEPMscPbl6aJz2xK",
"schedule_start": "2025-12-29T18:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T19:00:00+01:00"
},
{
"id": "c861e27c-9f67-404e-8ec2-d0b634e19f97",
"kind": "sos",
"name": "RopeLabs Rope Jam",
"slug": "ropelabs-rope-jam",
"url": "https://api.events.ccc.de/congress/2025/event/c861e27c-9f67-404e-8ec2-d0b634e19f97/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": "en",
"description": "**⚠️ This is a sober event. Anyone we suspect is intoxicated will be turned away.**\r\n\r\nA rope jam is an open, unstructured space to practice, explore, and share rope skills together.\r\n\r\nYou can arrive alone, with a partner, or in a small group. You are welcome to tie, be tied, switch roles, self-tie, observe, or simply quietly talk rope.\r\n\r\nWe will start with a short introduction and matching game to help connect people who arrive on time. Late arrivals will not be admitted. You may also bring your own partner or choose to observe only.\r\n\r\nThis is a non-sexual space. Sensual, rope-focused play is permitted. Wear what you want. A minimum level of coverage is required at all times, as would be expected in a gym. The event is open to participants aged 18 and over.\r\n\r\nWhat to bring\r\n* Non-stretch rope if you have it\r\n* A blanket or cushions for sitting on the floor\r\n* Comfortable clothing. Avoid loose layers if possible\r\n* A small amount of practice rope will be available.\r\n\r\nRules\r\n* Consent is mandatory. Always ask first.\r\n* Respect boundaries, focus, and personal space.\r\n* Do not interrupt active scenes.\r\n* Keep conversation low and rope-focused.\r\n* No photography unless everyone involved agrees.\r\n\r\nWhether you are new to rope or have years of experience, this is a relaxed space to learn, practice, and connect. Come say hi, we do not bite unless asked.\r\n\r\nLocation and time may still change.\r\nPlaces are limited by room size. You will need a ticket per person.\r\nGet your free ticket here: [https://ticket.kinkygeeks.de/kinkygeeks/ropelabs-ropejam/](https://ticket.kinkygeeks.de/kinkygeeks/ropelabs-ropejam/)",
"schedule_start": "2025-12-29T22:30:00+01:00",
"schedule_duration": "02:55:00",
"schedule_end": "2025-12-30T01:25:00+01:00"
},
{
"id": "a772df36-2b1c-46d2-b14b-33f155f9bbd2",
"kind": "sos",
"name": "Rust programming language: An absolute beginner workshop with intro presentation",
"slug": "rust-programming-language-an-absolute-beginner-wor",
"url": "https://api.events.ccc.de/congress/2025/event/a772df36-2b1c-46d2-b14b-33f155f9bbd2/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": "en, de",
"description": "**A heartfelt welcome!**\r\n\r\nWe will hold a Rust workshop for beginners.\r\n\r\nWe will start with an introduction in the form of a lecture of about 45 minutes.\r\n\r\nThis will be followed by a period of about 120 minutes (including a break), during which you are going to work through exercises independently and at your own pace.\r\n\r\nWe will help with any questions. We — and you — will be supported by the automated Rustlings course.\r\n\r\nOther experienced Rust developers will be on hand to help all participants directly with questions during the workshop.\r\n\r\nDon't hold back: You are very welcome to ask questions during the workshop!\r\n\r\n**You will need:**\r\n\r\n- A laptop, prepared as described below, so we can get started right away.\r\n\r\n**Preparation**\r\n\r\n- Follow the instructions at **<https://rustlings.rust-lang.org/>** for the installation of Rust itself, as well as the interactive Rustlings course.\r\n- Also note the instructions for the editor and terminal. The integration with [**rust-analyzer**](https://rust-analyzer.github.io/) will make your Rust experience much more enjoyable!\r\n\r\n**Verify that your setup works ahead of time!**\r\n\r\nIf you would like to receive help setting this up or verifying that your setup works well (especially if you use Windows), please come by our friendly Rust assembly or contact me directly.\r\n\r\n**Power supply**\r\n\r\nThe workshop rooms at the venue are not well prepared for work with many laptops: unfortunately, there will not be any power sockets at the tables!\r\n\r\n- Please bring your laptop fully charged.\r\n- If you can, then bring a long cable and multi-sockets, so you can provide yourself and others with electricity.\r\n\r\n**See you at the workshop — great to have you!**\r\n\r\nLeonie ([**@calisti@chaos.social**](https://chaos.social/@calisti))",
"schedule_start": "2025-12-28T11:00:00+01:00",
"schedule_duration": "03:00:00",
"schedule_end": "2025-12-28T14:00:00+01:00"
},
{
"id": "0de1bea3-ff4d-4e1b-b562-5066049c54a5",
"kind": "sos",
"name": "Safety First, Innovation Last? Überleben als Embedded-Entickler",
"slug": "der-embedded-migrationspfad-purpose-ai-proofing-di",
"url": "https://api.events.ccc.de/congress/2025/event/0de1bea3-ff4d-4e1b-b562-5066049c54a5/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de",
"description": "Zielgruppe:\r\nEmbedded Entwickler, Architekten, System-Ingenieure, die sich fragen: \"Bringt meine Arbeit der Welt noch etwas, und habe ich morgen noch einen Job?\" Besonders für High-End-Entwickler aus Legacy-Branchen (Automotive, Industrie, Luftfahrt).\r\n\r\nFormat:\r\nOpen-Space & Reverse Mentoring Diskussion (45 Minuten): Ein Austausch in zwei Teilen.\r\n\r\nDie Große These:\r\nDein gut bezahlter Legacy-Job ist ein Goldener Käfig, dessen Opportunitätskosten exponentiell steigen. C-Legacy und veraltete Prozesse machen uns zu Low-Hanging-Fruit für die nächste Generation von Code-Copilots und AI-Automatisierung. Wir müssen uns neu positionieren und unsere Skills \"AI-Proofen\".\r\n\r\nDer Austausch:\r\nDies ist ein Networking-Event für den Ausbruch. Wir suchen den direkten Austausch mit Leuten, die die Migration bereits erfolgreich geschafft haben (z. B. von Automotive zu MedTech, Startups, oder Open Source). Wir diskutieren: Welchen Purpose hat unser Wissen in nachhaltigeren Branchen? Welche Skills (abseits von C95) sind jetzt gefragt?\r\n\r\nCall to Action:\r\nKomm, teile deinen Schmerz und triff diejenigen, die ihren Karriere-Reset-Knopf schon gedrückt haben.",
"schedule_start": "2025-12-29T20:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T21:20:00+01:00"
},
{
"id": "17c89be4-e426-4993-9184-9a8e082385ad",
"kind": "sos",
"name": "Satanism Meetup: Empathy. Reason. Advocacy.",
"slug": "satanist-furry-cruising",
"url": "https://api.events.ccc.de/congress/2025/event/17c89be4-e426-4993-9184-9a8e082385ad/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Level 3 Lounging Area, I know c3nav is down (as of writing) but here is the link https://39c3.c3nav.de/l/c:3:231.44:166.13/ and this is my outfit https://chaos.social/@saxnot/115807559373915969 shout",
"language": "de, en",
"description": "[there are c3nav trouble please call if we're hard to find! My tshirt is [https://chaos.social/@saxnot/115807559373915969](https://chaos.social/@saxnot/115807559373915969)]\r\n\r\nQuestion all the things and break free from traditional religion. Already a \"spicy atheist\" or like to be one? Let's meet and join forces! \r\nSmite your enemies and burn the dogma of the dead hand, together <3 <3\r\n\r\nI (saxnot) am member of The Satanic Temple (TST) but all denominations are very welcome!\r\n\r\n\r\n# What's Satanism?\r\n\r\n- [The Satanic Temple] views Satan neither as a supernatural being, nor a symbol of evil, but instead relies on the literary Satan as a symbol representing \"the eternal rebel\" against arbitrary authority and social norms, or as a metaphor to promote pragmatic skepticism, rational reciprocity, personal autonomy, and curiosity.[[1]](https://en.wikipedia.org/wiki/The_Satanic_Temple#top)\r\n\r\n\r\n# Quotes of The Satanic Bible to give you a taste:\r\n\r\n- Life is the great indulgence—death, the great abstinence. Therefore, make the most of life—HERE AND NOW!\r\n\r\n- For I stand forth to challenge the wisdom of the world—to interrogate the “laws” of man and of “God”. \r\nI request reasons for your golden rule, and ask the why and wherefore of your Ten Commands. \r\nBefore none of your printed idols do I bend in acquiescence, and he who saith “thou shalt” to me is my mortal foe. \r\nI demand proof over all things and accept with reservations even that which is true.\r\n\r\n\r\n# The seven Tenets of TST (your church might differ!)\r\n\r\n- I) One should strive to act with compassion and empathy toward all creatures in accordance with reason.\r\n\r\n- II) The struggle for justice is an ongoing and necessary pursuit that should prevail over laws and institutions.\r\n\r\n- III) One’s body is inviolable, subject to one’s own will alone.\r\n\r\n- IV) The freedoms of others should be respected, including the freedom to offend. To willfully and unjustly encroach upon the freedoms of another is to forgo one's own.\r\n\r\n- V) Beliefs should conform to one's best scientific understanding of the world. One should take care never to distort scientific facts to fit one's beliefs.\r\n\r\n- VI) People are fallible. If one makes a mistake, one should do one's best to rectify it and resolve any harm that might have been caused.\r\n\r\n- VII) Every tenet is a guiding principle designed to inspire nobility in action and thought. The spirit of compassion, wisdom, and justice should always prevail over the written or spoken word.\r\n\r\n\r\n# REGIE SATANAS!\r\n\r\n# AVE SATANAS!\r\n\r\n# HAIL SATAN!",
"schedule_start": "2025-12-30T10:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T10:50:00+01:00"
},
{
"id": "abcc9535-44f1-480a-9996-bc17d4137c7e",
"kind": "sos",
"name": "Sbor medžuslovjanskogo jezyka",
"slug": "sbor-medzuslowjanskogo-jezyka",
"url": "https://api.events.ccc.de/congress/2025/event/abcc9535-44f1-480a-9996-bc17d4137c7e/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "en, de",
"description": "Medžuslovjanski jest ustrojny jezyk, razumlivy vsim Slovjanam.\r\n\r\nSbor otvorny vsem interesovatim – tož ako medžuslovjanskym ne govoriš. Cělkom bez plana.\r\n\r\nDobrodošli!\r\n\r\n[Hočem veče togo!](http://steen.free.fr/interslavic/) / [Ne razuměm :(](https://interslavic-dictionary.com)",
"schedule_start": "2025-12-27T20:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T20:25:00+01:00"
},
{
"id": "d1778875-8959-4efa-8975-9c0993d00294",
"kind": "sos",
"name": "Science fiction brunch",
"slug": "science-fiction-brunch",
"url": "https://api.events.ccc.de/congress/2025/event/d1778875-8959-4efa-8975-9c0993d00294/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "next to Pixelebbe (Layer 2, G6)",
"language": "en",
"description": "Let's share the premises of our favorite science fiction stories :-)\r\n\r\n(Everyone needs to bring their own food.)\r\n\r\n📍 The location of this session might change, please check here again before the session starts. **The location is currently set to be [next to Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Layer 2, G6).** We will sit on the floor and won't have much space because we don't want to obstruct escape routes.📍\r\n\r\n**[Recommendations](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-30T10:30:00+01:00",
"schedule_duration": "00:30:00",
"schedule_end": "2025-12-30T11:00:00+01:00"
},
{
"id": "ad1cc4c7-e125-4cbe-ac14-9e8aaafe5a6f",
"kind": "sos",
"name": "Science in Science Fiction: Die reale Wissenschaft von Star Trek und Star Wars",
"slug": "science-in-science-fiction-die-reale-wissenschaft-",
"url": "https://api.events.ccc.de/congress/2025/event/ad1cc4c7-e125-4cbe-ac14-9e8aaafe5a6f/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
"location": null,
"language": "de",
"description": "In Science Fiction gibt es Überlichtgeschwindigkeit, Aliens, Antigravitation, Terraforming, Schutzschilde, Beamen, Railguns, KI, Fusion, Nano, und noch viel mehr. \r\n\r\nDieser Vortrag gibt einen Überblick, was die moderne Wissenschaft dazu sagt. Der Stand der Wissenschaft entwickelt sich weiter und das kommt nur langsam in der Science Fiction Literatur und in der Öffentlichkeit an. Was stimmt noch und was hat sich geändert? Was ist wissenschaftlich fundiert, was wäre vielleicht doch möglich und was wird immer erfundene Wissenschaft bleiben. \r\n\r\nEin realistischer Blick auf die Technologien von Star Trek und Star Wars. Außerdem ein Blick über den Tellerrand, denn auch in der Vergangenheit wurden ab und zu schon Technologien erfunden, die sich vorher niemand vorstellen konnte.",
"schedule_start": "2025-12-28T17:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T18:20:00+01:00"
},
{
"id": "8cc61f1f-7f76-490c-acff-6f4be5e19e2f",
"kind": "sos",
"name": "Search Engine Creators Meetup",
"slug": "search-engine-creators-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/8cc61f1f-7f76-490c-acff-6f4be5e19e2f/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
"location": null,
"language": "en, de",
"description": "Meeting of creatures who have already tinkered with search engines, for getting to know each other and exchanging knowledge.\r\n\r\nIf you are interested in search engines, but have no prior knowledge [Search engines for the Curious](https://events.ccc.de/congress/2025/hub/en/event/detail/search-engines-for-the-curious) on day 3 is the even t for you.\r\n\r\nBring\r\n* problems where you are curious how others solved them\r\n* solutions others may be interested in\r\n* Lots of curiousness\r\n* some time to chat and listen\r\n\r\nIf you are curious about how search engines work but haven't worked on one yet you might be interested in the session \"Search Engines for the Curious\" which is aimed to be accessible to newcomers.\r\n\r\nExact location are still to be announced.\r\n\r\nNote: SoS Workshop D is way too large, I'd be happy to free up the reservation in exchange for a small location (maybe ~20 people) (and maybe a 50min slot)",
"schedule_start": "2025-12-28T10:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T10:55:00+01:00"
},
{
"id": "a458319b-983e-4d64-b850-fd1ce2f779cc",
"kind": "sos",
"name": "Search Engines for the Curious (The more readable version)",
"slug": "search-engines-for-the-curious",
"url": "https://api.events.ccc.de/congress/2025/event/a458319b-983e-4d64-b850-fd1ce2f779cc/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Free Knowlwdge Habitat worksop area",
"language": "en, de",
"description": "You've just learned that some chaos-creatures tinker with their own search engines in their free time (as in real web search with its own index) and want to know more?\r\n\r\nThis meetup aims to bring together those who already have experience building search engines with those who want to know more about that.\r\n\r\nPlanned format is an \"ask me anything\". Creatures who want to answer questions are welcome (please contact Slatian in advance). \r\n\r\nI you have already worked on a search engine you may be interested in the [Search Engine Creators Meetup](https://events.ccc.de/congress/2025/hub/en/event/detail/search-engine-creators-meetup) on day 2.\r\n\r\n* [c3nav](https://39c3.c3nav.de/l/a43a3d71-b30f-41c9-8e64-50284e0405f2)\r\n* [The Event on the Free Knowledge Habitat Pretalx](https://pretalx.wikimedia.de/39c3-2025/talk/H8VLAD/)\r\n* [Pretalx synced event](https://events.ccc.de/congress/2025/hub/de/event/detail/search-engines-for-the-curious_bdbx)",
"schedule_start": "2025-12-29T10:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T11:30:00+01:00"
},
{
"id": "a022566b-f89e-4025-bebe-ad239d018602",
"kind": "sos",
"name": "Security for small engineering teams",
"slug": "security-at-startupssmall-teams",
"url": "https://api.events.ccc.de/congress/2025/event/a022566b-f89e-4025-bebe-ad239d018602/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "en",
"description": "https://docs.google.com/presentation/d/1DpV4sVjJ__9z0k74aTIG5l8h2qM3nG-9caeSTv6Suig/edit?usp=sharing\r\n\r\nAvailable until day 3 + 7 days. Contains contact and slides.\r\n\r\nThe only skipped slide is the one about rulesets, it also contains an OSS release for compliance work.\r\n\r\n--------\r\n\r\n\r\nHow do you manage security in small software engineering teams or startups (2-50 people)?\r\nWhat did you implement? Which changes did you implement or push for as a security person?\r\n\r\nI previously worked at a small NGO and startup and want to create a space to share experiences.\r\n\r\nInitially, I'll give some insights about what I implemented in the past year, however the goal is to have a discussion.\r\n\r\nTopics might include:\r\n- Fuzzing\r\n- Responsible disclosure (both incoming and outgoing)\r\n- DefectDojo, Dependabot and SecObserve\r\n- GitHub's security features\r\n- Static analyzers ranging from Semgrep to Zizmor\r\n\r\nPut in notes here if you want to join! https://cryptpad.fr/pad/#/2/pad/edit/3iZ8MLCkX9I3xcTsh6uc2LwA/",
"schedule_start": "2025-12-29T17:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T17:50:00+01:00"
},
{
"id": "8ac82d03-a4e1-4b89-aae5-afde47a75dbd",
"kind": "sos",
"name": "Se habla español",
"slug": "se-habla-espanol",
"url": "https://api.events.ccc.de/congress/2025/event/8ac82d03-a4e1-4b89-aae5-afde47a75dbd/?format=api",
"track": null,
"assembly": "sos",
"room": "c2d2090b-32f1-48e9-9233-b43de3066aa6",
"location": null,
"language": "en",
"description": "Un espacio para reunir a la comunidad de habla hispana en el 39c3. La idea es presentarnos brevemente (¿de dónde vienes? ¿en qué andas?), platicar y hacer comunidad. El idioma principal será español pero el espacio es abierto y flexible. Sin formalidades ni láminas, solo personas.\r\n\r\nA space to bring together the Spanish-speaking community at the 39c3.\r\nThe idea is to briefly introduce ourselves (where are you from? what are you working on?), chat, and build community. Spanish will be the main language but the space is open and flexible. No formalities or slides, just people.",
"schedule_start": "2025-12-27T18:00:00+01:00",
"schedule_duration": "00:25:00",
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},
{
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"name": "Selbsthilfegruppe für Menschen in der Energiewirtschaft",
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"url": "https://api.events.ccc.de/congress/2025/event/16cd571e-2ee2-4e91-bb88-8178155216d4/?format=api",
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"location": "Runder Tisch vor der Bits und Bäume - Workshop Area (unterm Flugzeug)",
"language": "de",
"description": "(Bringt gerne was zum Frühstücken mit, dann machen wir uns eine gemütliche Runde)\r\n\r\nWir sind Menschen aus der Energiewirtschaft, die Lust auf Austausch und Vernetzung haben! Gemeinsam wollen wir Ideen teilen und Open-Source-Tools in der Branche weiter voranbringen.\r\n\r\nUnser Alltag ist geprägt von den Herausforderungen der edi@energy-Dokumente und dem ständigen Schnittstellenchaos – und genau deswegen haben wir Open-Source-Tools wie die AHB-Tabellen oder den Bedingungsbaum entwickelt, um uns (und euch) das Leben ein bisschen leichter zu machen.\r\n\r\nAußerdem engagieren wir uns im gemeinnützigen Verein BO4E (Business Objects for Energy), um ein simples und offenes Datenmodell für die Energiebranche zu entwickeln. Unser Ziel: weniger Frust, mehr Effizienz.\r\n\r\nIn dieser Session steht das Kennenlernen und Netzwerken im Mittelpunkt. Wenn du auch Lust hast, die Branche mit neuen Ideen und Open-Source-Projekten zu bereichern, dann bist du hier genau richtig!\r\n\r\nLinksammlung:\r\n\r\nhttps://www.bo4e.de\r\nhttps://github.com/bo4e\r\n\r\nhttps://bedingungsbaum.hochfrequenz.de\r\nhttps://ahb-tabellen.hochfrequenz.de\r\nhttps://ebd.hochfrequenz.de\r\nhttps://fristenkalender.hochfrequenz.de\r\n\r\nhttps://github.com/Hochfrequenz/digital_market_communication\r\n\r\nWir freuen uns darauf, dich kennenzulernen und gemeinsam die Energiebranche ein Stückchen besser zu machen! 🚀",
"schedule_start": "2025-12-28T11:30:00+01:00",
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},
{
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"name": "Selbsthilfegruppe Unternehmens IT / Enterprise IT support group",
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"url": "https://api.events.ccc.de/congress/2025/event/47aa9d9a-4d14-45bf-a4d2-5b32ddec7c06/?format=api",
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"language": "de, en",
"description": "Finally NIS.2 will arrive in most european countries, let's chat about our experience with the way enterprise (=legacy ?) software vendors deal with security.",
"schedule_start": "2025-12-29T13:00:00+01:00",
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},
{
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"url": "https://api.events.ccc.de/congress/2025/event/b6069b0d-2d5d-438b-a611-4fb145e94815/?format=api",
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"description": "Ähnlich wie in den letzten Jahren wollen wir uns auch dieses Jahr wieder treffen und uns rund um das Thema Verwaltungsdigitalisierung austauschen und vernetzen.\r\n\r\nWas ist der Faxgeräteclub und warum machen wir das?\r\n\r\nWenn wir über Behörden-IT sprechen, dann sprechen wir oft über einen zwingend notwendigen Wissensaufbau und die Internalisierung von IT-Kompetenz in der öffentlichen Verwaltung. Aber wer sich dann tatsächlich für einen Job in der Verwaltung entscheidet oder aus der Zivilgesellschaft heraus positiv auf die Verwaltung einwirken will, die:der braucht viel Überzeugungstalent und oft auch Durchhaltevermögen. Aber wir können auch viel Positives bewirken.\r\n\r\nWoran scheitert es in der Praxis, wo liegen die strukturellen Probleme und welche Impulse braucht es jetzt aus der Politik?\r\n\r\nWir sprechen im Faxgeräteclub über unsere Erfahrungen im Alltag in und mit Behörden, darüber, was in der Verwaltung alles noch falsch läuft und wie wir gemeinsam etwas daran ändern können. Kommt vorbei uns lasst uns gemeinsam in lockerer Runde ein wenig diskutieren und Pläne schmieden! Willkommen sind alle, die sich für die IT der öffentlichen Verwaltung interessieren und/oder gerne mit uns ihre Ideen oder Fragen teilen möchten.",
"schedule_start": "2025-12-27T16:30:00+01:00",
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"name": "self-organized infrastructure meetup",
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"schedule_start": "2025-12-29T15:00:00+01:00",
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},
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"url": "https://api.events.ccc.de/congress/2025/event/15c754b3-cbc8-40af-9835-3873f0374e63/?format=api",
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"location": "Bits&Bäume Workshop Area (Hall H)",
"language": "en, de",
"description": "Computer programs run with all privileges of the running user. If your user can read your emails, then so can any other program you run. However, many programs do not need most permissions and perhaps should not have them at all.\r\n\r\nThis workshop demonstrates quite simple ways in which software can self-restrict itself. The focus will not be on foreign, potentially malicious software, but on hardening programs against misconduct and future security vulnerabilities.\r\n\r\nSeveral operating systems have developed different interfaces that restrict software beyond its normal scope. This workshop will focus on POSIX and especially OpenBSD because of its user-friendly APIs. Although other operating systems, such as Linux, will be discussed, they will not be covered in depth due to their more complicated APIs.\r\n\r\nWithin the workshop part, software with known security vulnerabilities is then patched together - usually with almost a single line. Ideally, an exploit has hardly any effect afterwards, although the vulnerability is still present. This is not intended to encourage carelessness, but rather to demonstrate the development of a further safety net for software.\r\n\r\nA basic understanding of programming is required and, more importantly, an interest in the topic. You will need to bring an SSH client, for example a laptop with (almost) any operating system.\r\n\r\nThe language will be either English or German, depending on who shows up.",
"schedule_start": "2025-12-30T12:00:00+01:00",
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},
{
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"kind": "sos",
"name": "SERVFAIL Domain Name Session",
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"url": "https://api.events.ccc.de/congress/2025/event/0bdced6b-d08f-4d13-a63d-a9145ae994f8/?format=api",
"track": null,
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"location": "Øl Telecom assembly",
"language": null,
"description": "Unique opportunity! Get exclusive FREE invite codes from the founders of SERVFAIL! And discuss Domain Name Shenanigans.",
"schedule_start": "2025-12-29T16:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T16:25:00+01:00"
},
{
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"name": "shaders show & tell",
"slug": "shaders-hackshow",
"url": "https://api.events.ccc.de/congress/2025/event/6031a0c5-8b52-4cb5-80e7-92238f9b40aa/?format=api",
"track": null,
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"location": "https://39c3.c3nav.de/l/c:0:166.28:100.79/ (c-base, nord-west table near the shaderamp projection screen)",
"language": "en",
"description": "Self-organized show & tell focused on shaders.\r\nWe’ll have a projector and screen — bring your laptop with HDMI to show your demos.\r\nFeatured live demos:\r\n- swiss.gl http://swiss.gl/\r\n- shaderamp https://github.com/ArthurTent/ShaderAmp",
"schedule_start": "2025-12-28T17:00:00+01:00",
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},
{
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"name": "Share Your Citizen Science: Projects, Pets, and Paths for Collaboration ( Is This Citizen Science — and Do You Want Anything from ECSA?)",
"slug": "share-your-citizen-science-projects-pets-and-paths",
"url": "https://api.events.ccc.de/congress/2025/event/5afbde81-25dc-4dd8-849a-25f0ef69fca6/?format=api",
"track": null,
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"description": "Citizen science can mean many things: DIY measurements, community research, data activism, social experiments, artistic inquiry, or collective knowledge work. At CCC, many such projects exist — often without ever using the label “citizen science”.\r\nThis session follows a “show your pet” format. Participants are invited to bring and briefly present their own projects, tools, experiments, or unfinished ideas and share:\r\nwhat the project does\r\n\r\n\r\nwho participates\r\n\r\n\r\nhow (or if) it serves a community\r\n\r\n\r\nwhether calling it “citizen science” helps or gets in the way\r\n\r\n\r\nProjects do not need to be finished, funded, successful, or formally recognised. Critical, messy, and experimental work is explicitly welcome.\r\nAlongside peer exchange, the session creates space to explore if and how collaboration with the wider citizen science community — including ECSA — could be useful:\r\nWhat kinds of support would actually help these projects?\r\n\r\n\r\nWhere does institutional collaboration feel helpful — or harmful?\r\n\r\n\r\nWhat would make collaboration worth the effort?\r\n\r\n\r\nThe goal is not recruitment or alignment, but to understand what collaboration should look like from the project side, if at all.\r\n\r\nWebsite: https://www.ecsa.ngo/\r\nMastodon: @ECSA\r\nStart your own Citizen Science Project\r\nhttps://moodle.citizenscience.eu/",
"schedule_start": "2025-12-27T15:00:00+01:00",
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},
{
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"name": "Shitty Robot Battle",
"slug": "shitty-robot-battle",
"url": "https://api.events.ccc.de/congress/2025/event/f9a5fe48-1609-40c0-a750-57984d0998c3/?format=api",
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"language": "de, en",
"description": "Shitty Robot Battle!\r\n\r\nPlease register at 39c3@shitty-robots.com!\r\n\r\nThere ist also a Workshop ( https://events.ccc.de/congress/2025/hub/en/event/detail/shitty-robot-workshop ) but robots that were not build in the workshop are also welcome!\r\n\r\nWe also needs volunteers as judges for the battle!\r\n\r\nParticipants please come at Day 3 on10 p.m. to the shared table 22(Hall H) .\r\n\r\nLink to the Lightning talk : Link zum Lightning talk : https://media.ccc.de/v/39c3-lightning-talks-tag-3#t=6038",
"schedule_start": "2025-12-29T22:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T22:55:00+01:00"
},
{
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"kind": "sos",
"name": "Shitty Robot Workshop (until 8 a.m.)",
"slug": "shitty-robot-workshop",
"url": "https://api.events.ccc.de/congress/2025/event/53375d30-6758-4929-8700-0152b6d61039/?format=api",
"track": null,
"assembly": "sos",
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"language": "de, en",
"description": "We build Robots from garbage and need more garbage!\r\n\r\nBring your elektronic waste und soldering iron, multimeter and hammer!\r\n\r\nMicrocontrollers and other \"reasonable\" elektronic components alre also welcome!\r\n\r\nNo limits on age, no limits on weight and no limits on technology! \r\n\r\nOn Day 3 we let the robots battle each other : https://events.ccc.de/congress/2025/hub/en/event/detail/shitty-robot-battle\r\n\r\nThe system says that the workshop ends at 1:50, but we do not stop then ;-)\r\nWe plan to tinker until 8 a.m.\r\n\r\n\r\nThere ist a box in Saal D where you can drop hardware.",
"schedule_start": "2025-12-28T00:30:00+01:00",
"schedule_duration": "07:30:00",
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},
{
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"kind": "sos",
"name": "Situation on anarchist prisoners in Belarus",
"slug": "uprising-in-belarus-revisted-5-years-later-2",
"url": "https://api.events.ccc.de/congress/2025/event/250ba0c1-79dd-4061-918c-befcb8150975/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
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"description": "Talk with ABC Belarus\r\n\r\nIt’s been 5 years since people in Belarus rose up against dictatorship of Alexander Lukashenko and for months tried to get rid of authoritarian regime through peaceful demonstrations, direct actions, strikes and acts of sabotage. The world has changed radically since that uprising with situation in Belarus becoming even more precarious since russia’s full scale invasion of Ukraine.\r\n\r\nAt this anniversary we are going to look into the past, talk about the reality of resistance against russian empire and what were the chances of success for people in Belarus in 2020 knowing all the plans of Putin at this point of history.\r\n\r\nThe presentation expects you to have basic knowledge of political situation in Belarus/Russia/Ukraine.",
"schedule_start": "2025-12-29T16:30:00+01:00",
"schedule_duration": "00:25:00",
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},
{
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"kind": "sos",
"name": "Skat Crashkurs",
"slug": "skat-crashkurs",
"url": "https://api.events.ccc.de/congress/2025/event/b8222e34-dafc-4a00-a976-270cf1e3d53a/?format=api",
"track": null,
"assembly": "sos",
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"location": "c3skat assembly",
"language": "de, en",
"description": "An intoroduction course into the card game Skat for beginners. No prior knowledge required.",
"schedule_start": "2025-12-28T16:30:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T17:30:00+01:00"
},
{
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"kind": "sos",
"name": "Slow internet, fast money: How Deutsche Telekom breaks the internet",
"slug": "slow-network-fast-money-how-deutsche-telekom-break",
"url": "https://api.events.ccc.de/congress/2025/event/00afd3a8-2dfb-43e4-91ca-ff589dd491dc/?format=api",
"track": null,
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"location": "Saal 5",
"language": "en, de",
"description": "In Europa ist die Netzneutralität ein im EU-Recht verankertes Prinzip, das besagt, dass alle Daten im Internet gleich behandelt werden müssen. Doch was geschieht, wenn große Anbieter wie die Deutsche Telekom dieses Prinzip durch ihre Zusammenschaltungspraktiken systematisch verletzen?\r\n\r\nDas Projekt Netzbremse.de dokumentiert einen alarmierenden Fall: Millionen von Telekom-Kunden erleben eine künstliche Drosselung ihrer Verbindung, weil die Telekom sich weigert, ihre Peering-Kapazitäten angemessen auszubauen. Als einziger Internetanbieter in Deutschland müssen Nutzer und Netzbetreiber an beiden Enden der Leitung zahlen, um Überlastungen zu vermeiden. Die Folge: massive Qualitätseinbußen bei Videostreaming, Online-Spielen und Online-Konferenzen – insbesondere Abends. Netzbetreiber und Content-Anbieter, die nicht bereit sind, für eine störungsfreie Verbindung zu zahlen, leiden unter schlechter Servicequalität. Ein Bündnis aus Verbraucherschutz, Zivilgesellschaft und Forschung geht nun gegen diesen direkten Angriff auf das offene und freie Internet vor.\r\n\r\nDiese Session wird veranstaltet von Gesellschaft für Freiheitsrechte (GFF) und epicenter.works.",
"schedule_start": "2025-12-30T15:30:00+01:00",
"schedule_duration": "00:30:00",
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},
{
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"kind": "sos",
"name": "social work get together",
"slug": "social-work-get-together",
"url": "https://api.events.ccc.de/congress/2025/event/4544a34b-29a3-4290-bd76-42a8beab390b/?format=api",
"track": null,
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"language": "de, en",
"description": "where are the social workers within the chaos? get together :)",
"schedule_start": "2025-12-27T16:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T16:50:00+01:00"
},
{
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"kind": "sos",
"name": "Softer Softwares Discussion",
"slug": "softer-softwares-discussion",
"url": "https://api.events.ccc.de/congress/2025/event/0dedf686-d71e-4cf6-ba7c-16be89fa0883/?format=api",
"track": null,
"assembly": "sos",
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"location": "Chill Lounge, 4th Floor by the Memleak Bar",
"language": "en",
"description": "Software is not soft. We want softer software!\r\n\r\nWhy is the accepted software paradigm to separate humans into two categories: the programmer and the user?\r\n\r\nOne reason is that software is still so difficult to modify that even programmers have a hard time, leaving the user completely hopeless!\r\n\r\nUsers exist in a disempowered and (even more frequently today) often disenfranchised position. Because power structures exist in software just as they do in society, the choice to build and distribute software through apps packaged for the market reinforces and hardens this unfortunate imposition on the user and compounds many of the imbalances we see in society today. Computing is too transformational a medium to relegate to the limited domain of the app.\r\n\r\nWe are a coalition of researchers, designers, educators and builders working toward a new paradigm of computing that is more malleable, transparent, and user-empowering. We seek not only to make computing as thoughtfully crafted and as easy to change as it is to use, but to leverage that softness of software to recenter the user as the locus of ownership over their digital lives. This is super fun and very ethical! Imagine all the amazing forms of software when billions more people are able to effect change over their computing medium and build on each others ideas.",
"schedule_start": "2025-12-29T16:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T16:25:00+01:00"
},
{
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"kind": "sos",
"name": "Software Defined Radio Capture The Signal (SDRCTS)",
"slug": "software-defined-radio-capture-the-signal-sdrcts",
"url": "https://api.events.ccc.de/congress/2025/event/baa1c2c5-31f8-4b7c-b4a7-3bd0606a6ef4/?format=api",
"track": null,
"assembly": "sos",
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"location": "online - https://sdrcts.tildepipe.org",
"language": "en",
"description": "Learn software defined radio with gnuradio\r\n\r\nSolve riddles about digital signals, modulations and other systems in gnuradio. A CTS is one of the best possibilities to learn a lot in a short time. \r\n\r\nDifficulty level: Beginner to medium.\r\n\r\nNote: This is an online project, you do NOT need a 39C3 ticket!\r\n\r\nhttps://sdrcts.tildepipe.org",
"schedule_start": "2025-12-27T11:00:00+01:00",
"schedule_duration": "3 05:00:00",
"schedule_end": "2025-12-30T16:00:00+01:00"
},
{
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"kind": "sos",
"name": "Sortiere das Bällebad / sort the ball pit",
"slug": "sortiere-das-ballebad-sort-the-ball-pit",
"url": "https://api.events.ccc.de/congress/2025/event/cd6c0622-b0cb-49f0-b750-b7040256db37/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "im Bällebad (Foyer vor Saal 4 gegenüber Garderobe / Fundbüro)",
"language": "de, en",
"description": "Have you always wanted to sort a ball pit? As efficiently as possible? And maybe even do some maker-related stuff? Then meet us, the \"Bällerinas\" and tinker with us on software and hardware.",
"schedule_start": "2025-12-27T14:00:00+01:00",
"schedule_duration": "00:45:00",
"schedule_end": "2025-12-27T14:45:00+01:00"
},
{
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"kind": "sos",
"name": "Sortiere das Bällebad / sort the ball pit",
"slug": "sortiere-das-ballebad-sort-the-ball-pit_a9rk",
"url": "https://api.events.ccc.de/congress/2025/event/69855197-9ad2-4c7a-89fb-e0381ddde4f7/?format=api",
"track": null,
"assembly": "sos",
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"location": "Bällebad (Foyer vor Saal 4 gegenüber Garderobe / Fundbüro)",
"language": "de, en",
"description": "Have you always wanted to sort a ball pit? As efficiently as possible? And maybe even do some maker-related stuff? Then meet us, the \"Bällerinas\" and tinker with us on software and hardware.",
"schedule_start": "2025-12-28T14:00:00+01:00",
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"description": "https://events.ccc.de/congress/2025/hub/de/event/detail/wer-liegt-hier-wem-auf-der-tasche-genug-mit-dem-burgergeld-fetisch-sturmt-die-palaste\r\n\r\nNachdem in diesem Talk wahrscheinlich viel über Bürgergeld und \"neue Grundsicherung\" geredet wurde, gehen wir hier in einem praktischen Austausch zu einem selbstbewussten Umgang mit dem ganzen Scheiß. Es geht um Tipps, Tricks und Hacks im alltäglichen Umgang mit dem Jobcenter. Die Referentin bezieht bereits seit mehreren Jahren unsanktioniert Bürgergeld, ohne auch nur einen einzigen Termin wahrgenommen zu haben, aber das ganze soll mehr ein offener Austausch sein, bei dem alle etwas beitragen können, als ein linearer Vortrag.",
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"description": "A meetup open for everyone interested in space exploration, space travel, satellites, CubeSats, satellite tracking, DIY astronomy, amateur rocketry ... you name it.\r\nA place to hang out (and to show of projects). The goal is to bring all the different people hacking on space topics in our community in one place, explore existing projects and come up with new ideas to hack where no congress has hacked before.\r\n\r\nPlease be aware, that we aim to provide a safe environment for all galactic life forms (although we are only able to provide an oxygen atmosphere). We come in peace!",
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"description": "You will be given a series of algorithmic challenges that you have to solve in a certain amount of time. Whether you are an experienced developer or a beginner, this is a great opportunity to expand your knowledge 💡\r\n\r\nTo participate, you should bring a device with you, ideally a laptop, so that you can solve the challenges. There is a short tutorial to help you prepare: https://hackmd.io/2zLdA8eOT9-GifslGQZSvw?view",
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"description": "I made a bargain, now I have to keep up my end of the deal.\r\n\r\nThis is the 10x sped-up version of my other talk on day 1 -- for the ADHD crowd, for anyone who missed the first talk, or for those that just wanna enjoy the show and have a laugh.\r\n\r\n[https://events.ccc.de/congress/2025/hub/en/event/detail/hacking-medical-research-for-a-better-transition](https://events.ccc.de/congress/2025/hub/en/event/detail/hacking-medical-research-for-a-better-transition)\r\n\r\nThis is a speedrun. I cannot select less than 25 minutes, but I do not intend to go over 5 minutes unless I have to reset. I would prefer to do this as lightning talk, but I'm not sure they support LiveSplit.",
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"description": "Meet like-minded people in the sticker self-help group. We create and design stickers and talk about our experiences and pain.\r\n\r\nSSHG\r\n\r\nUpdate: Official Link https://sshg.cybahn.de",
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"description": "A meetup for steno enthusiasts, users & those interested in stenography (both machine stenography & shorthand)\r\n\r\nThere will be a short introduction presentation on how machine stenography works (specifically the Plover theory, as that is freely available & the one I'm most familiar with), and I'll also bring all my hardware so you can try it out on your own devices - you do need Plover installed on your own laptop though to be able to use that hardware (https://github.com/openstenoproject/plover).\r\n\r\nI'm looking forward to seeing what kind of hardware & theories others are using, so do bring your things ^^\r\n\r\n(If enough people show up we'd just continue after the 25min somewhere else)",
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"description": "We want to get together, talk about our experiences with Ink/Stitch and machine embroidery, show off projects and network. \r\n\r\nThere is no agenda, we'll just sit down together and see what we feel like talking about. \r\n\r\nInk/Stitch is a plugin for Inkscape that can be used to design embroidery patterns for machine embroidery.\r\n\r\nHere is the pad we created, feel free to take a look and contact me here on the hub: https://hedgedoc.c3d2.de/r_NgjtxrSdiOSzkKG7g_TA?view#",
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{
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"name": "Stop Neurodiverse Discrimination Now",
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"description": "Society is not built for neurodivergent minds. Discrimination, exclusion, and institutional bullying are not individual misfortunes; they are systemic failures. I will share insights from my own journey and the practical tools I’ve developed to fight back against these structures.\r\n\r\nBut individual resilience isn't enough. We are using this session at 39C3 to found a community that refuses to accept institutional discrimination. Our goal is to organize peer support, expose systemic abuse, and build a solid infrastructure for mutual aid.\r\n\r\nThis is not a lecture. Together, we will define how this collective will operate. Bring your anger, your ideas, and your skills. Let’s hack the structures that try to shut us out.",
"schedule_start": "2025-12-29T10:30:00+01:00",
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"schedule_start": "2025-12-30T14:00:00+01:00",
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{
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"name": "Super Mario Odyssey(Decomp) — A tale about decompiling and research",
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"description": "An overview of learnings and best-of discoveries as well as impressive projects surrounding the reverse engineering and modding of Super Mario Odyssey.\r\n\r\nIn more than four years of decompiling the game ([OdysseyDecomp](https://github.com/MonsterDruide1/OdysseyDecomp)) we have learnt about Nintendo's code practices and mistakes, some easter-eggs, and unused content. While a part of the community was busy taking the game apart, others focused on creating something new - in this talk, I show our decomp project along with a live demo of the workflow, some interesting easter eggs, unintended behaviour and interesting concepts in Nintendo's code, and finally some best-ofs and current state of the modding community.\r\n\r\nReach out to me after the talk!\r\nDiscord: @monsterdruide1\r\nDECT: 5750",
"schedule_start": "2025-12-29T17:00:00+01:00",
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"name": "Tales of apartheid",
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"url": "https://api.events.ccc.de/congress/2025/event/2d9296bd-bfcd-41bd-aeb9-07909321132a/?format=api",
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"description": "After yesterday we had way too many people not being able to hear us at the self organised session, we want to repeat it with a room and mics, giving everyone an oppurtunity to participate.\r\nI am palestinan with israeli citisinship and I lived about 30 years under the apartheid.\r\nWith my is an activist who was in the westbank during 2022 to 2024, who next to his activism was collecting data for his university work, documenting the dynamics between settlers and the palestinans.",
"schedule_start": "2025-12-29T23:30:00+01:00",
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},
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"url": "https://api.events.ccc.de/congress/2025/event/9c5ecc2f-74a0-4a96-be59-a2adc40760b0/?format=api",
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"schedule_start": "2025-12-30T01:00:00+01:00",
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},
{
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"name": "#TeamDatenschutz-Meetup",
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"url": "https://api.events.ccc.de/congress/2025/event/cda91c48-845d-42dc-a19b-441f020117d3/?format=api",
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"language": "de, en",
"description": "The #TeamDatenschutz (team data protection) is used in the (more or less) social networks to assemble data protection officers, programmers, lawyers, activists, or supervisory authorities, as well as other people interested in data protection.\r\n\r\nThis Self-organized Session - attempting to is intended as a meet up, where people can meet other persons interested in data protection, maybe see someone again, and for sharing or ranting about data protection topics and issues, etc.",
"schedule_start": "2025-12-29T11:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T12:20:00+01:00"
},
{
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"kind": "sos",
"name": "Teamtype – multiplayer mode for your text editor!",
"slug": "teamtype-multiplayer-mode-for-your-text-editor",
"url": "https://api.events.ccc.de/congress/2025/event/d4707753-08fb-47ba-9477-04711d154e7b/?format=api",
"track": null,
"assembly": "sos",
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"description": "We've been working on Teamtype (previously known as Ethersync) for two years now: It connects directories on different computers together, and keeps them in sync. And if you open a file in your text editor, you can edit it together, and see each other's cursors.\r\n\r\nThis enables a new form of smooth real-time collaboration. You can use it for pair programming or note-taking, for example, all from the comfort of your own editor! It feels a bit like the missing real-time complement to Git.\r\n\r\nTeamtype follows local-first principles, and uses encrypted peer-to-peer connections (you don't need a server or an account). You can also work on entire projects, not just single files.\r\n\r\nAt 39C3, it's time for a live demo! Let me show you how Teamtype works and what you can do with it! We're maintaining plugins for Neovim and VS Code/Codium; others are working on plugins for Jetbrains IDEs, have integrated it into TeXstudio, or are building a web editor for it! I can also show you some more experimental features like a Hedgedoc bridge, or writing commit messages together.\r\n\r\nWe'd be excited for more collaboration on collaboration, so let me show you how to get involved!\r\n\r\nIn the final part of this session, you can install & try Teamtype for yourself in a frantic massively-multiplayer editing experiment! :D\r\n\r\n- Source code: <https://github.com/teamtype/teamtype>\r\n- Documentation: <https://teamtype.github.io/teamtype/>\r\n- Mastodon: <https://fosstodon.org/@teamtype>",
"schedule_start": "2025-12-28T12:00:00+01:00",
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},
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"name": "tech from below",
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"description": "[tech from below](https://techfrombelow.de/) is a Berlin-based meetup that brings together tech-savvy activists and activist developers to discuss tech tools for social movements. In this special edition, we’ll introduce ourselves and hear from three projects that use technology in their political work.\r\n\r\n* **[Klasse & Methode – IT Collective Stuttgart](https://klasse-methode.it/)** will present the community calendar software [Lauti](https://lauti.org/)\r\n* **[https://esc-it.org](esc-IT Collective)** creates content for IT security trainings for activists\r\n* **[neinzurbezahlkarte.de](https://neinzurbezahlkarte.de/) / [bezahlkarte-stoppen.de](https://bezahlkarte-stoppen.de)**: App for subscription management of payment card vouchers\r\n\r\n\r\nThe event will be held in German only.",
"schedule_start": "2025-12-28T18:30:00+01:00",
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"name": "Tech over Tea: Palestine solidarity with communities in resistance",
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"description": "On Day 1, a group of people came together to ask: How can we talk about Palestine. Individuals have taken the ideas shared since then throughout 39C3. \r\n\r\nThis is a space for people to gather and share their experiences the past few days. Individuals who are new to the topic of Palestine and thinking about the implications of tech, such as cloud technologies, for surveillance, war, and genocide are also invited to join and listen.\r\n\r\nA reminder to all participants to remain excellent to each other and hold space for each other if tensions arise, we feel discomfort, or grapple with gnarly thoughts that haven't settled. \r\n\r\nThe discussion will likely be in English. People are encouraged to share in the language that is most comfortable to them (English, German, etc), and where possible we can translate.",
"schedule_start": "2025-12-30T11:30:00+01:00",
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},
{
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"name": "Teilchendetektor im Keller? Ich hab's gemacht! Die Theorie und der Bau einer Funkenkammer",
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"url": "https://api.events.ccc.de/congress/2025/event/ed994dd7-88c3-454e-b99a-5d63858db442/?format=api",
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"description": "Myonen-Detektion mit einer Funkenkammer. Wie funktioniert das eigentlich? \r\n\r\nMyonen sind Teilchen, die Elektronen sehr ähnlich sind, nur deutlich schwerer. Sie entstehen in der kosmischen Hintergrundstrahlung und treffen ständig auf die Erde. Eine praktische Eigenschaft dieser Teilchen ist, dass sie beim Durchqueren von Materie, Moleküle ionisieren. Auf ihrem Weg hinterlassen sie also Spuren aus freien Elektronen.\r\n\r\nIn einer Funkenkammer macht man sich genau diesen Effekt zunutze: Zwischen zwei Elektroden liegt ein starkes elektrisches Feld an. Wenn ein vorbeifliegendes Myon ein Gas ionisiert, werden die frei gewordenen Elektronen im Feld beschleunigt und lösen einen sichtbaren Funken aus. So wird die unsichtbare Spur des Myons kurzzeitig sichtbar. \r\n\r\nWie kann man wissen, ob das detektierte Teilchen ein Myon ist? Welche technischen Herausforderungen gibt es? Wie nützlich ist eine Funkenkammer heutzutage noch? Inwiefern gibt es Überschneidungen mit Teilchendetektoren am DESY oder CERN? Das alles versuche ich zu beantworten.\r\n\r\nBeim 38c3 habe ich bereits einen Vortrag mit dem Titel „Einführung in die Teilchenphysik“ gehalten. Seitdem habe ich viel dazugelernt und freue mich darauf, dieses Wissen mit euch zu teilen, mit euch in den Austausch zu gehen und euch auf meinem Weg zur angehenden Teilchenphysikerin mitzunehmen.\r\n \r\nDer Vortrag ist für alle Lebewesen gedacht. Egal ob ihr Vorwissen mitbringt oder nicht. \r\n\r\nIch freue mich auf euer Kommen!",
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"description": "Come to the Tetrapod Operation Centre for all your tetrapod requirements.\r\n\r\nC3NAV: https://39c3.c3nav.de/l/c:0:191.33:93.04/\r\nLevel 0, Hall H, K1",
"schedule_start": "2025-12-27T15:00:00+01:00",
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},
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"url": "https://api.events.ccc.de/congress/2025/event/56bb25c0-b7c2-4a58-835e-3ce62d809dfc/?format=api",
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"description": "Kissing is wonderful and we should do it more often. During the Kissening, strangers meet to consensually kiss each other.\r\n\r\nIn order to recognize other people who might want to kiss, put a sticker - any sticker really - on your chest. You can, of course, also be creative and use badges, etc. Just make sure that others know that you want to be part of the Kissening. \r\n\r\nOnce you found someone, go up to them and ask if they want to kiss. Be very mindful of explicit consent and simply respect a \"no\". Talk about the kind of kissing you want to perform and only proceed to kiss of there is clear, unmistakable verbal consent.",
"schedule_start": "2025-12-28T20:00:00+01:00",
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"description": "The aim of this low-key meet-up is to discuss the current state of LEO / MEO constellations and the benefits they provide.\r\nWe will also discuss potential risks and vulnerabilities as well as future fields for research in the security community.",
"schedule_start": "2025-12-29T18:00:00+01:00",
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"description": "Official 39C3 Tor Relay Operators Meetup supported by the Tor Project.\r\n\r\nAs always, TROMs are open for everyone who is running a relay, wants to run a relay or just thinks about it. 🙂\r\n\r\nAt this point we don't have a agenda, but everyone is free to bring up questions or topics at the meeting itself.",
"schedule_start": "2025-12-30T00:00:00+01:00",
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"description": "Let's discuss how to move universities towards more digital sovereignty to safeguard an open and independent science.",
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{
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"description": "In this workshop we will learn how to make easy transdermal HRT (Hormone Replacement Therapy) products for trans people ourselves!\r\n\r\nThe two variants are sprays and gels, there are enough base ingredients for both.\r\n\r\nI forgot to register this workshop earlier but you can just join us at any time at our assembly Projekt31 for a workshop.",
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"description": "In diesem Workshop lernen wir, wie wir transdermale HET (Hormon Ersatz Therapie) Produkte für trans Personen einfach selber machen können.\r\n\r\nDie beiden Möglichkeiten sind dabei Sprays und Gels, für beides sind genug Zutaten da.\r\n\r\nEs gibt nur einen (rudimentären, scuffed) Setup dafür und es eignet sich nicht um in größerer Runde zu arbeiten. Wenn viele kommen gerne unabhängigen Austausch von Rezepten, Methoden, Vernetzen von trans Menschis oder Aktivistis. In den Folgetagen kann an der Asembly (Projekt31) auch noch gut gebraut werden\r\n.",
"schedule_start": "2025-12-28T00:00:00+01:00",
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"description": "Meetup for trans and non binary peoples. There is no agenda, just a chance to meetup other people and maybe Blahajs :3",
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"description": "this shall be a meetup of train-interested people and nerds. unconference-style, whoever wants to participate and wants to talk about a topic, just come in and announce your topic.\r\n\r\nIf there isn't enough time, the conversations can always be continued elsewhere.",
"schedule_start": "2025-12-29T10:30:00+01:00",
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"url": "https://api.events.ccc.de/congress/2025/event/8b06246d-d95c-4934-9568-2f9cc51a0cc5/?format=api",
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"description": "Nach dem Vortrag zur Netzpolitik in der Schweiz (Tag 3, Saal Fuse, 19:15) sind alle interessierten Personen eingeladen, die Diskussion in einer self-organized Session fortzusetzen. Es werden Aktivist:innen von verschiedenen Organisationen der Netzpolitik in der Schweiz anwesend sein.",
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"schedule_duration": "01:20:00",
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{
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"url": "https://api.events.ccc.de/congress/2025/event/d1f336a3-60e8-4d84-9177-0affad1c86f8/?format=api",
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"location": "Chillout Area In Foyer of Hall 3 ==> https://39c3.c3nav.de/l/c:0:156.89:158.38/",
"language": "en, de",
"description": "Does it not sit right with you either when people say bugs are inevitable and every system has its 0-day eventually? Let's meet up and talk about the options to never have that happen.\r\n\r\nTurns out that systems for which mathematical proof that can never happen have made it out of academia and into production. An open source tooling ecosystem is also coming up at the moment.\r\n\r\nLet's meet up and talk about what is possible already, what can be done and what should be done from the point of view of community-made software - there are a bunch of interesting implications with EU product liability and standards bodies may to require verification eventually. \r\n\r\nI can give a short conceptual introduction about how proof works, what it covers, what else you need to fully trust your whole stack (by stealing shamelessly from talks people have given in the seL4 community) and give pointers to some documentation you can use to run a proven secure seL4 microkernel on your Raspberry Pi - the technical/mathematical detail beyond that is also still beyond me.\r\n\r\nGet/Stay in touch:\r\nhttps://signal.group/#CjQKIIwPr-1D84DcrKdEcDEUjnDGWLLKhI9iM_NqRfSMbmQmEhCW30zKOq-nsiaT_afkyQyK \r\n\r\nIf after this you're itching to go prove something there is a workshop at the Nix assembly at 20:00 (unrelated to this),\r\nhttps://events.ccc.de/congress/2025/hub/en/event/detail/careful-whispers-of-proof-assistants-lean4-nix-nvi",
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"description": "EDIT 29.12.25: We created a group in signal. If you want to get in contact with chaos creatures who are interested in TI, just join: https://signal.group/#CjQKIImIrmmsDgqS5AJaBs8BVTcO2upgeTPtyPv3a8zu35CoEhAzxY6MsB3eYVmd4-7pRfLj\r\n\r\nDo you play Twilight Imperium and want to discuss it with other creatures or want to find/create new gaming groups? Or do you not know this epic and complex sci-fi board game about diplomacy, politics, war and intrigue yet? Let us use this short time slot for a quick meeting to share our contacts to stay in touch. Possible advantages we are going to have are e.g.:\r\n\r\n- New regional groups for (regular) games\r\n- Sharing/Discussions about house rules\r\n- Creation/Discussions of new maps",
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"description": "We’re meeting for a casual session around the UltraStar project.\r\n\r\nWe’ll talk about:\r\n- which UltraStar-related projects currently exist,\r\n- where the community is active,\r\n- how to get involved,\r\n- and what new features and setups are available.\r\n\r\nThe session is open to:\r\n- people who already use UltraStar\r\n- those who want to get to know the project\r\n- potential contributors (code, songs, UX, testing)\r\n- curious visitors who just want to drop by\r\n\r\nIf there’s time, we’ll also do a short live demo and/or sing together\r\n\r\nFeel free to bring questions, ideas, or your own setup knowledge!",
"schedule_start": "2025-12-29T16:30:00+01:00",
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"name": "(Un-)Hacking Digital Sovereignty",
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"track": null,
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"description": "As members of the Switzerland Chapter of the Internet Society we would like to bring together activists, NGOs, and businesses who strive to make our communities, states, and supranational institutions truly digitally sovereign, i.e.: As (collaborative but independent) actors connected by distributed networks powered by free software enabling the free exchange of information over open data formats.\r\n\r\nGiven that those who dislike this vision have deep pockets, excellent contacts to politicians, and marketing teams who try to give \"digital sovereignty\" a very different meaning from how we understand it (\"buy European\"), we as a community should \r\n\r\na) network to get to know the other actors who are working on this topic and be more effective **together**,\r\nb) understand what is going on elsewhere in Europe, and \r\nc) exchange news, ideas, challenges, successes and failures in influencing policy so that other activists can learn from them.\r\n\r\nCryptpad document for the session: https://cryptpad.fr/code/#/2/code/edit/9Xjq3o+57GnYbmNmGWY2fxCv/",
"schedule_start": "2025-12-29T21:00:00+01:00",
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"name": "Unsicherheitspaket 2.0",
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"url": "https://api.events.ccc.de/congress/2025/event/6c071880-f894-40e5-81c4-ae5767a78ab1/?format=api",
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"description": "Meet-up for people interested in fighting against the \"Unsicherheitspaket 2.0\" surveillance measures.",
"schedule_start": "2025-12-29T16:30:00+01:00",
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{
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"kind": "sos",
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"description": "Talk with ABC Belarus\r\n\r\nIt’s been 5 years since people in Belarus rose up against dictatorship of Alexander Lukashenko and for months tried to get rid of authoritarian regime through peaceful demonstrations, direct actions, strikes and acts of sabotage. The world has changed radically since that uprising with situation in Belarus becoming even more precarious since russia’s full scale invasion of Ukraine.\r\n\r\nAt this anniversary we are going to look into the past, talk about the reality of resistance against russian empire and what were the chances of success for people in Belarus in 2020 knowing all the plans of Putin at this point of history.\r\n\r\nThe presentation expects you to have basic knowledge of political situation in Belarus/Russia/Ukraine.",
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{
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"location": "Eschelsweg 4, (Altona) 22767 Hamburg",
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"description": "US American amateur radio exam. Take the test, become a radio amateur.\r\n\r\nFurther Details: https://ham-exam.org/en/exam-ccc\r\n\r\nPlease not that we exam will be located at Attraktor, NOT in the Congress Center. The distance is approx. 4 km, the address is as follows:\r\n\r\nEschelsweg 4 (Altona)\r\n22767 Hamburg\r\n\r\nOSM: https://www.openstreetmap.org/node/2866066044#map=19/53.549873/9.946473",
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"location": "Near Coffee geeks area",
"language": "en",
"description": "Meet people from https://vas3k.club/\r\nTelegram: https://t.me/mikhail_kulemin",
"schedule_start": "2025-12-30T12:30:00+01:00",
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},
{
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"url": "https://api.events.ccc.de/congress/2025/event/bc5ae16f-7451-447f-a3fe-dd9cd4de3a48/?format=api",
"track": null,
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"location": "VCF@Congress Assembly",
"language": "de",
"description": "The VCFB e.V. is holding its annual member meeting (in German).",
"schedule_start": "2025-12-29T12:15:00+01:00",
"schedule_duration": "01:00:00",
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},
{
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"kind": "sos",
"name": "Vegan Chaos: Bring-Along Fingerfood Brunch",
"slug": "vegan-chaos-bring-along-fingerfood-brunch",
"url": "https://api.events.ccc.de/congress/2025/event/8f23bf2e-1a03-43dc-808e-24df2dfb8f58/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
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"language": "de, en",
"description": "**Meet & Eat: Come to the Vegan Chaos Bring-Along Fingerfood Brunch! Bring whatever you like, sweet or savoury, anything goes as long as it's vegan!**\r\n\r\nThe great thing about this principle: It will scale. If everyone brings something, there is always enough – no matter how many people will be there.\r\n\r\nDue to the special congress situation, finger food is best suited for this get-together. If you have access to a kitchen, feel free to prepare something! If not: go to the supermarket, see what's available, and improvise. To be prepared for anything, bring your own cups, dishes & forks if you need them.\r\n\r\n### More Information:\r\n\r\n- To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)**\r\n- Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)**\r\n\r\n### Our Events:\r\n\r\n- 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)**\r\n\r\n- 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)**\r\n\r\n- 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)**\r\n\r\n- 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)**\r\n\r\n- 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)**\r\n\r\n- 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)**\r\n[![Vegan Chaos Community](https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/918d60965337/39C3veganchaos-kl.png \"Vegan Chaos Community\")](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)",
"schedule_start": "2025-12-29T13:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-29T14:20:00+01:00"
},
{
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"kind": "sos",
"name": "Vegan Chaos: Farewell Meeting",
"slug": "vegan-chaos-farewell-meeting",
"url": "https://api.events.ccc.de/congress/2025/event/746f2679-d129-46f0-8980-4cdce0de899c/?format=api",
"track": null,
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"description": "**Today we are pulling down our tents.** We are meeting as vegan hacktivists and beings with an interest in animal rights and sustainability for a farewell meeting - to look back together on what we have experienced and to make concrete arrangements: How do we continue organising the Vegan Chaos Community? What are the next ideas, plans and projects?\r\n\r\nThere will also be opportunities for personal get-togethers after the Congress: Is a Vegan Chaos travelling group forming for other Chaos events? What else could happen next? Come along, let's put our heads together!\r\n\r\n### More Information:\r\n\r\n- To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)**\r\n- Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)**\r\n\r\n### Our Events:\r\n\r\n- 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)**\r\n\r\n- 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)**\r\n\r\n- 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)**\r\n\r\n- 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)**\r\n\r\n- 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)**\r\n\r\n- 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)**\r\n\r\n[![Vegan Chaos Community](https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/918d60965337/39C3veganchaos-kl.png \"Vegan Chaos Community\")](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)",
"schedule_start": "2025-12-30T11:00:00+01:00",
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},
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"description": "**Finally Congress again! The Vegan Chaos Community is a forum for vegan hacktivists and people concerned about animal rights and sustainable development.**\r\n\r\nAre you interested in these topics? Do you have an idea that you would like to realise or are you already active somewhere in the field of veganism? Or do you just want to network with like-minded people? Either way, come to our Meet & Greet on Day 1!\r\n\r\nWe will get to know each other, present what has happened so far and make valuable connections - for the upcoming days here in Hamburg and beyond! All Creatures are Welcome!\r\n\r\n### More Information:\r\n\r\n- To the **[Vegan Chaos Community Assembly](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)**\r\n- Follow us at Mastodon: **[@vegan@chaos.social](//chaos.social/@vegan)**\r\n\r\n### Our Events:\r\n\r\n- 27.12. | 13:00 | Room D | **[Vegan Chaos: Welcome Meet & Greet](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-welcome-meet-greet_zdm4)**\r\n\r\n- 27.12. | 20:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-1)**\r\n\r\n- 28.12. | 11:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-2)**\r\n\r\n- 29.12. | 13:00 | Room D | **[Vegan Chaos: Bring-Along Fingerfood Brunch](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-bring-along-fingerfood-brunch)**\r\n\r\n- 29.12. | 18:30 | Assembly | **[Vegan Chaos: Let's Talk](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-lets-talk-day-3)**\r\n\r\n- 30.12. | 11:00 | Room 6 | **[Vegan Chaos: Farewell Meeting](https://events.ccc.de/congress/2025/hub/en/event/detail/vegan-chaos-farewell-meeting)**\r\n\r\n[![Vegan Chaos Community](https://usercontent.events.ccc.de/congress/2025/hub/usercontent/e/918d60965337/39C3veganchaos-kl.png \"Vegan Chaos Community\")](https://events.ccc.de/congress/2025/hub/en/assembly/detail/vegan_chaos)",
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"kind": "sos",
"name": "VoidLinux drinkup",
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"url": "https://api.events.ccc.de/congress/2025/event/9cfd260f-ddb0-43a7-971a-b25d7d6ab280/?format=api",
"track": null,
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"location": "Uptime Bar",
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"description": "Do you use or contribute to VoidLinux and want to meet the distro maintainers? Come join some maintainers for a drink!\r\n(Free drink for contributors!)",
"schedule_start": "2025-12-28T21:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T21:55:00+01:00"
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{
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"name": "Von der Wäscheklammer bis zur Modell-Kuppelklemme einer Seilbahn",
"slug": "von-der-wascheklammer-bis-zur-modell-kuppelklemme-",
"url": "https://api.events.ccc.de/congress/2025/event/416af645-da83-41b6-8215-705ea35af152/?format=api",
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"language": "de",
"description": "How does a detachable cable car actually work?\r\n\r\nI've been fascinated by these mechanical giants for a long time and have been working on implementing this technology as a working model. I've brought along the first prototypes to show you!\r\n\r\nIn this short talk, I'd like to show you what's needed to clamp onto a cable and how to develop such a detachable clamp.\r\n\r\nRequired prior knowledge: What a clothespin is",
"schedule_start": "2025-12-28T12:00:00+01:00",
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},
{
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"kind": "sos",
"name": "Vortrag: Wie können wir durch gute Kommunikation über unsere Spielvorlieben mehr Spaß an Pen&Paper-Rollenspiel haben, anschließend Congress-Pen&Paper-Night",
"slug": "roleplay-night",
"url": "https://api.events.ccc.de/congress/2025/event/b57e7df8-1d24-458c-91a8-fcd7b281e4db/?format=api",
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"description": "A place for your TTRPG session. The whole night!\r\nFantasy to sci-fi, cosy to thrilling, rules light to rules heavy. It doesn't matter if you already played or will try it for the first time, this is the place to do it.\r\nThere will be limited materials (pens, paper). Please bring your own to ensure everyone can have some.\r\n\r\nMore information on https://c3rp.koehr.ing/",
"schedule_start": "2025-12-28T22:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-28T23:20:00+01:00"
},
{
"id": "53b5307a-d85d-4dc1-a1fd-d26238953c7b",
"kind": "sos",
"name": "VTuber-Fan-Meetup",
"slug": "vtuber-fan-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/53b5307a-d85d-4dc1-a1fd-d26238953c7b/?format=api",
"track": null,
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"location": "Assembly: Datenburg (Chaostreff Bonn), Foyer of Hall 3, E5",
"language": "de, en",
"description": "A small Vtuber Fan Meetup to chat and get to know each other, for fans of all kinds of Vtubers.",
"schedule_start": "2025-12-28T20:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-28T21:00:00+01:00"
},
{
"id": "c802f623-ccb7-4f3c-ba6b-1260ce3f1156",
"kind": "sos",
"name": "VyOS on non-x86 meetup",
"slug": "vyos-on-non-x86-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/c802f623-ccb7-4f3c-ba6b-1260ce3f1156/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Meet at PoC desk, we'll move to a suitable place",
"language": "de, en",
"description": "We'd like to coordinate efforts to run/maintain VyOS on non-x86 hardware\r\n\r\nUpdate: Further coordination happens in #poorvyos on libera.",
"schedule_start": "2025-12-28T16:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T16:25:00+01:00"
},
{
"id": "5f628589-e717-4f00-99b9-e7b4aa7a957a",
"kind": "sos",
"name": "Was ist Awareness? Was macht c3awareness? ❤️🩹 What is awareness? What does c3awareness do?",
"slug": "was-ist-awareness-was-macht-c3awareness_qmf7",
"url": "https://api.events.ccc.de/congress/2025/event/5f628589-e717-4f00-99b9-e7b4aa7a957a/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
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"language": "de, en",
"description": "Are you interested in awareness work during Chaos events? Would you even like to help the c3awareness Team? Come by and get to know us then!\r\n\r\nWe will talk a bit about how we work - during the events and throughout the year. There will be a chance to ask questions and there are some things we would like your opinion on as well!",
"schedule_start": "2025-12-29T20:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T21:20:00+01:00"
},
{
"id": "d2380674-d290-41b5-b306-1372d6360e18",
"kind": "sos",
"name": "\"We are the Battlefields\" (Film: Mathieu Rigouste/2024) - Das Globale Geschäft mit Krieg und Kontrolle / Genre: Dokumentation / Reportage",
"slug": "we-are-battlefields-film-mathieu-rigouste2024-das-",
"url": "https://api.events.ccc.de/congress/2025/event/d2380674-d290-41b5-b306-1372d6360e18/?format=api",
"track": null,
"assembly": "sos",
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"language": "en, de",
"description": "CN: oppression, violance, repression\r\n\r\n“Since the early 2000s, I've been investigating oppressive security and surveillance systems oppressive security and surveillance systems while actively engaging with activism and political while actively engaging with activism and political\r\nmovements. Because of this, I've been put on movements. Because of this, I've been put on a watch-list by the French government’s government’s intelligence services.\r\n\r\nI believe that we need to better understand, to understand the control and crushing power forced upon us, the people, by the war machine. My determination to people, by the war machine. My determination to fight against these powers led me to go and fight against these powers led me to go and investigate the problem at the heart of the French investigate the problem at the heart of the French\r\nwar machine – Milipol – the world's leading trade war machine – Milipol – the world's leading trade fair for internal state security.\r\n\r\nFollow me behind the scenes of this global business. Together, we'll investigate the making of business. Together, we'll investigate the making of wars, the globalization of surveillance and the wars, the globalization of surveillance and the\r\nbusiness of repression. \r\n\r\nThe aim of this investigation is to shed light on the inner workings of a system by letting its main inner workings of a system by letting its main players tell their own stories, face-to-face with the players tell their own stories, face-to-face with the camera. We will reflect on our findings with camera. We will reflect on our findings with the help of those who suffer at the hands of the military industrial complex on a daily basis and military industrial complex on a daily basis and who are constantly fighting it in order to exist.\r\n\r\nThroughout our investigation, we question our participation in systems and the order of things in the world. Similarly, we question our ability to the world. Similarly, we question our ability to preserve and transform ourselves. \r\nIn the reflection of the war machine, we face ourselves and what we want to become.\"\r\nMathieu Rigouste - investigative journalist / filmmaker\r\n\r\nhttps://mathieurigouste.net/-Nous-sommes-des-champs-de-bataille-",
"schedule_start": "2025-12-30T01:00:00+01:00",
"schedule_duration": "01:20:00",
"schedule_end": "2025-12-30T02:20:00+01:00"
},
{
"id": "5e4957e1-4479-4fc5-90b3-be49d0c6b9bc",
"kind": "sos",
"name": "web browser fingerprinting",
"slug": "web-browser-fingerprinting-survey-of-attacks-and-m",
"url": "https://api.events.ccc.de/congress/2025/event/5e4957e1-4479-4fc5-90b3-be49d0c6b9bc/?format=api",
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"language": "en",
"description": "",
"schedule_start": "2025-12-30T14:00:00+01:00",
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"schedule_end": "2025-12-30T14:25:00+01:00"
},
{
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"name": "We show Quadball🏐🤾🏿♀️🏳️⚧️: brooms, a snitch, six hoop-goals and lots of gender diversity and fun",
"slug": "we-show-quadball-brooms-a-snitch-six-round-goals-a",
"url": "https://api.events.ccc.de/congress/2025/event/f0425c0b-ef72-424b-85bb-ca224de48754/?format=api",
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"description": "Quadball combines the best of rugby, handball, and dodgeball -- let's talk about that!\r\nIt looks like this -> [https://chaos.social/@saxnot/115754026830564736](https://chaos.social/@saxnot/115754026830564736)\r\n\r\nAgain we will present Quadball (Muggle Quidditch) at congress! Very small intro to the sport rules followed by casual Q&A.\r\n\r\nQuadball champions gender diversity with its gender rule:\r\n\"A team may not have more than three players who identify as the same gender in play at the same time\"\r\ngiving an edge to nonbinary players.\r\n\r\nJendrik and saxnot play in the Braunschweiger Broomicorns, one of the leading german quadball teams.\r\n\r\nFind a quadball league near you!\r\n\r\n<https://dqbsport.de/>",
"schedule_start": "2025-12-28T18:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T18:25:00+01:00"
},
{
"id": "3555a1ef-3804-48b3-b50d-91ad63df1eeb",
"kind": "sos",
"name": "What the Guix!?",
"slug": "what-the-guix",
"url": "https://api.events.ccc.de/congress/2025/event/3555a1ef-3804-48b3-b50d-91ad63df1eeb/?format=api",
"track": null,
"assembly": "sos",
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"language": "en",
"description": "Hey you! Psst, are you a developer or an IT person? Do you use multiple computers with many packages and move between them back and forth?\r\nI feel your pain and may have some remedy for it. You don't have to sell your soul to get out of dependency hell, BTW ;-) I will show you how to embrace the Functional Programming Model even at the operating system level! Eelco Dolstra explored these ideas in his PhD thesis in 2006, also introducing NixOS. Today we focus on GNU Guix, inspired by NixOS Ludovic Courtès started this lispy project in 2012.",
"schedule_start": "2025-12-28T17:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T17:55:00+01:00"
},
{
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"kind": "sos",
"name": "Where Do All The Leaks Go? OpenAleph Roundtable",
"slug": "where-do-all-the-leaks-go-openaleph-roundtable",
"url": "https://api.events.ccc.de/congress/2025/event/33d920dc-0ffa-485a-89be-e5a5c66a967b/?format=api",
"track": null,
"assembly": "sos",
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"description": "Abstract: If you work involves sifting through and making sense of large amounts of data, we welcome you to a session on OpenAleph (openaleph.org) where we can brainstorm (and commiserate) together. We will show practical examples of surfacing interesting leads from leaked data and explore falsely-held beliefs that stand in the way of investigators. Making sense of a large volume of data is marketed as being a textbook use-case for generative AI. We beg to differ.\r\n\r\nDescription: Making sense of large amounts of unstructured data makes users reach for prompting a chatbot. Newsrooms and organizations we work with hope to “ask questions” in a chat window, instead of searching through their data. But these same users rightfully demand accuracy and deterministic results. If they don’t find exactly what they are looking for, they doubt the efficiency of the entire software stack.\r\n\r\nOur experience, at the Data and Research Center (darc.li) with supporting research and investigations with algorithms and infrastructure led to insights about how to answer difficult questions in a deterministic way.\r\n\r\nThis session will walk the audience through several features that surface names, companies, and other interesting data from large leaks. We will explore conundrums about search and deduplication features, which pose difficult questions for investigators and programmers.\r\n\r\nThere are many falsehoods we tend to believe about our world. What is a name, actually? What constitutes a country, and who decides on that? How do you search for words across several languages, all at once? And how do you reveal hidden links in large volumes of data?\r\n\r\nAll these will be answered without prompting a chatbot, not even once!",
"schedule_start": "2025-12-29T19:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T20:20:00+01:00"
},
{
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"kind": "sos",
"name": "Widerstand gegen Debanking",
"slug": "widerstand-gegen-debanking",
"url": "https://api.events.ccc.de/congress/2025/event/91e75a96-1940-4225-9bfb-d97c2cf088e6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "SOS Lecture Hall E",
"language": "de",
"description": "NEW EVENT HERE: https://events.ccc.de/congress/2025/hub/de/event/detail/2-jahre-bezahlkarte-2-jahre-widerstand-gegen-_kzuw",
"schedule_start": "2025-12-29T21:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T22:20:00+01:00"
},
{
"id": "9960c6d6-93ad-4d22-b346-1a0883d902d1",
"kind": "sos",
"name": "Widerstand gegen Debanking",
"slug": "2-jahre-bezahlkarte-2-jahre-widerstand-gegen-_kzuw",
"url": "https://api.events.ccc.de/congress/2025/event/9960c6d6-93ad-4d22-b346-1a0883d902d1/?format=api",
"track": null,
"assembly": "sos",
"room": "ecd57af5-f5fe-4b00-bd18-005375deb4ac",
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"language": "de",
"description": "How are Antifa-Ost, the war in Ukraine, Antifa = terrorist group, an American despot, and the bank accounts of German left-wing anti-repression structures connected?\r\nThis fall, several political actors in Germany were affected. Among them were the anti-repression structures ABC Dresden and Rote Hilfe e.v: Our bank accounts were closed and several banks refused to open new ones. The reason? No official reason has been given to us so far. However, when we look at these events against the backdrop of the ongoing criminalization of anti-fascism and the classification of anti-fascists from Germany as terrorists by the US, a political motivation seems likely. This development is worrying and highlights the urgency of taking action against the ever-increasing shift to the right.\r\n\r\nAfter a brief update on the situation of affected groups and the political context in which debanking is taking place in Germany, we want to explore how we can respond to the current situation and develop a common perspective for action. \r\nOur goal: to make anti-repression structures capable of action again in the current times! Because we need them all more urgently than ever!\r\n\r\nWe would like to discuss the following topics in groups:\r\n- Networking among GLS members / GLS cooperative\r\n- Alternative and decentralized payment options. Creating independence from banks?\r\n- Gathering information, bringing transparency to commercial lists (OFAK and Worldcheck)\r\n- Leverage and pressure options on Bafin/authorities. Which actors are involved? Who creates sanctions and terror lists?",
"schedule_start": "2025-12-29T21:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T22:20:00+01:00"
},
{
"id": "622b485d-7b8a-4632-b149-89191f9cf0cf",
"kind": "sos",
"name": "Wie eine Gruppe Nerds einen Wald rettete und nur um Haaresbreite vier Wochen Gefängnis entkam",
"slug": "wie-eine-gruppe-nerds-einen-wald-rettete-und-_bgci",
"url": "https://api.events.ccc.de/congress/2025/event/622b485d-7b8a-4632-b149-89191f9cf0cf/?format=api",
"track": null,
"assembly": "sos",
"room": "4d734db6-fb54-460c-98fc-5f8c55025ef7",
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"language": "de",
"description": "Klimagerechtigkeitsaktivismus: ein Blick hinter die Kulissen.\r\n\r\nIn Augsburg und Ravensburg gibt es seit 2019 Nerdgruppen, die nicht nur starke Meinungen zu Programmiersprachendesign haben :-), sondern auch mit zivilem Ungehorsam versuchen, einen Beitrag für Klimagerechtigkeit zu leisten. Im Laufe der Zeit haben wir verschiedene Techniken erlernt und weiterentwickelt, die größtenteils auf beliebige andere Städte übertragbar sind.\r\n\r\nAktivismus wirkt leider meist verzögert, indirekt oder schwer quantifizierbar. In dieser Session möchten wir einen ganz bestimmtes Projekt vorstellen, bei dem sich ausnahmsweise der Erfolg doch unmittelbar und direkt eingestellt hat:\r\n\r\nDer erfolgreichen Rettung des rodungsbedrohten Forst Kasten bei München.\r\n\r\nIn Zeiten des Rechtsrucks freut sich vielleicht die eine oder andere Person hier über etwas Positives :-)\r\n\r\n**[Fotos](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-27T16:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T16:25:00+01:00"
},
{
"id": "81ba4c98-45d1-49fa-b83f-7dd93202fa37",
"kind": "sos",
"name": "Wie geht aktivistische Pressearbeit? Reichweite für erfolgreiche und verhinderte Aktionen. Workshop",
"slug": "wie-geht-aktivistische-pressearbeit-reichweite-fur",
"url": "https://api.events.ccc.de/congress/2025/event/81ba4c98-45d1-49fa-b83f-7dd93202fa37/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "next to Pixelebbe (Layer 2, G6)",
"language": "de",
"description": "📍 The location of this session might change, please check here again before the session starts. **The location is currently set to be [next to Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Layer 2, G6).** We will sit on the floor and won't have much space because we don't want to obstruct escape routes.📍\r\n\r\nIm Aktivismus können wir mittels Pressearbeit unseren Protestaktionen Reichweite verschaffen, die über das direkte Publikum hinausgeht.\r\n\r\nWie geht das, wie informiert man die Presse überhaupt? Ist Presse vertrauenswürdig? Was ist Framing und wieso ist es so wichtig? Wie kann man mit Pressearbeit auch aus behördlich verhinderten Aktionen oder Leaks noch aktivistische Erfolge generieren?\r\n\r\nWorkshop mit zahlreichen Praxisbeispielen.\r\n\r\n**[Quellen](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-29T16:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T16:50:00+01:00"
},
{
"id": "ff9bc670-fadb-4588-b1b1-7d5825d84767",
"kind": "sos",
"name": "Wie spielt man eigentlich Bridge?",
"slug": "wie-spielt-man-eigentlich-bridge",
"url": "https://api.events.ccc.de/congress/2025/event/ff9bc670-fadb-4588-b1b1-7d5825d84767/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Bits&Bäume Living Room",
"language": "de, en",
"description": "Was haben Buster Keaton, Omar Sharif, Winston Churchill und Mahatma Gandhi gemeinsam? Sie alle waren leidenschaftliche Bridgespieler.\r\n\r\nTauche mit uns in diesem Crashkurs ein in die faszinierende Welt des bekanntesten Stich-Kartenspiels der Welt. Denn Bridge ist nicht nur das \"Spiel der alten Damen in englischen Filmen\" sondern bietet jede Menge Möglichkeiten zu knobeln, ständig neues zu lernen, für Teamwork und ausgefeilte, analoge Kommunikationssysteme.\r\n\r\nIhr lernt bei uns die Grundregeln des Spiels und könnt euch direkt selbst am Problemlösen probieren. Wir haben ein paar Karten dabei, wenn ihr aber selbst Spielkarten (Französisches Blatt, 52 Karten) habt, bringt gerne welche mit.",
"schedule_start": "2025-12-30T11:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-30T11:25:00+01:00"
},
{
"id": "4347a170-1927-44b7-b0da-25b032c80cb0",
"kind": "sos",
"name": "Wie wir auf den höchsten Kirchturm der Welt stiegen, um der Kirche beim Klimaschutz auf das Dach zu steigen",
"slug": "wie-wir-auf-den-hochsten-kirchturm-der-welt-stiege",
"url": "https://api.events.ccc.de/congress/2025/event/4347a170-1927-44b7-b0da-25b032c80cb0/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "de",
"description": "Am 2. Juli 2024 kletterten wir unangemeldet auf das Ulmer Münster und platzierten dort auf einem riesigen Banner die Frage „Wäre Jesus Klimaaktivist?“. Viele Kirchengemeinden in ganz Deutschland hängten daraufhin diese Frage selbst an ihre Kirchen und der Theologie-Professor Ruben Zimmermann schrieb ein Buch über diese theologische Frage.\r\n\r\nDie These: Jesus hat sich laut Bibel immer für die Menschen eingesetzt, die wenig hatten. Die Klimakrise ist langfristig die größte Bedrohung für viele dieser Menschen. Wir glauben, Jesus würde sich heute als Aktivist engagieren. So wie er auch schon damals im Tempel Protest gemacht hat, weil ihm die Kommerzialisierung nicht passte. Darum sollten sich Kirchengemeinden aus ihrem Glauben heraus für Klimagerechtigkeit und die Bewahrung der Schöpfung einsetzen.\r\n\r\n\r\n🧮",
"schedule_start": "2025-12-29T11:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-29T11:50:00+01:00"
},
{
"id": "eca275bb-2186-42fc-bce9-9bf69c1a25d8",
"kind": "sos",
"name": "Windows Installparty",
"slug": "windows-installparty",
"url": "https://api.events.ccc.de/congress/2025/event/eca275bb-2186-42fc-bce9-9bf69c1a25d8/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "NixOS Assembly",
"language": "en, de",
"description": "Enough of random operating system where nothing is working? Visit us to install windows in your favourite version!",
"schedule_start": "2025-12-29T23:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T23:25:00+01:00"
},
{
"id": "bee1adbb-4b0e-46f9-b92a-3d195af914d1",
"kind": "sos",
"name": "Wir bauen einen Digital-O-Mat für die Berliner Wahl 2026",
"slug": "intro-und-kick-off-wir-bauen-einen-digital-o-mat-f",
"url": "https://api.events.ccc.de/congress/2025/event/bee1adbb-4b0e-46f9-b92a-3d195af914d1/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Digitale-Gesellschaft-Assembly, c-base Habitat",
"language": "de",
"description": "The next election for the House of Representatives will take place in Berlin in 2026.\r\n\r\nWhat are the positions of the parties running in the election on digital issues? And how can one “calculate” how closely these positions align with one's own political views? How should one deal with fascist parties, and what other details need to be taken into account?\r\n\r\nKleindatenverein.org has already built several Digital-O-mats and will also offer one for the 2026 Berlin election. After presenting possible types of Wahl-O-Mats, we want to decide on a model, determine the next steps, and ideally check in the first code.\r\n\r\nAnyone who wants to participate or just check it out is welcome to join. No prior knowledge is necessary.\r\n\r\nPeople from other states where elections will be held in 2026 and who are interested in building a Digital-O-Mat are especially welcome.",
"schedule_start": "2025-12-28T14:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T14:25:00+01:00"
},
{
"id": "2611779c-7e30-4369-a46c-1869d4735db8",
"kind": "sos",
"name": "Wir gründen eine Chaos-WG als solidarisches, selbstverwaltetes Wohnprojekt in Schleswig-Holstein/Hamburg.",
"slug": "wir-grunden-eine-chaos-wg-als-solidarisches-selbst",
"url": "https://api.events.ccc.de/congress/2025/event/2611779c-7e30-4369-a46c-1869d4735db8/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "de",
"description": "Eingeladen sind alle Interessierten die keine Lust mehr auf immer höhere Mieten für immer schlechteren Wohnraum haben und den Traum von einem bewohnten Hackspace/Makespace verwirklichen möchten.\r\n\r\nVoraussetzungen: Keine. Vorkenntnisse über das Modell des Mietshäusersyndikats (syndikat.org) sind aber von Vorteil.\r\n\r\nyellni [DECT 2297]",
"schedule_start": "2025-12-28T20:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-28T20:25:00+01:00"
},
{
"id": "7ba4325a-cc4e-4b80-8f92-c75264c19d98",
"kind": "sos",
"name": "wir klatschen für unsere engel 👏👏👏",
"slug": "wir-klatschen-fur-unsere-engel",
"url": "https://api.events.ccc.de/congress/2025/event/7ba4325a-cc4e-4b80-8f92-c75264c19d98/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "auf dem balkon vor dem späti",
"language": "de",
"description": "the session is german only - sorry but no other country would understand this.",
"schedule_start": "2025-12-29T19:00:00+01:00",
"schedule_duration": "00:05:00",
"schedule_end": "2025-12-29T19:05:00+01:00"
},
{
"id": "9410c3c9-92b6-4978-a9b9-4440ed34b901",
"kind": "sos",
"name": "Wissen, Geld, Macht: Die prekäre Situation der Geisteswissenschaften und warum sie Dich interessieren sollte",
"slug": "kristin-aubel-und-sonja-lemke",
"url": "https://api.events.ccc.de/congress/2025/event/9410c3c9-92b6-4978-a9b9-4440ed34b901/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Assembly Chaostreff und FOSS-AG TU Dortmund (Saal 3)",
"language": "de, en",
"description": "Knowledge, Money, Power: The precarious situation of the humantities and why You should care about it\r\n\r\nThe humanities primarily produce knowledge (aka neoliberally without value) and encourage critical thinking (aka dangerous for authoritarian regimes). Their financial and political status is therefore in even more danger than before - at the universities and in governmental committees. \r\nJoin us if you\r\n- are associated with the humanities and want to exchange (concrete) problems and (maybe) solutions. \r\n- want to know/discuss why this is so crucial for science and society in general.\r\n- are just curious.\r\n\r\nOrga: Kristin is/was a literary and cultural studies scholar at several universities in Germany and Austria. Sonja is a member of the research committee of the German Bundestag/parliament.",
"schedule_start": "2025-12-29T11:00:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T12:00:00+01:00"
},
{
"id": "c5b0284a-1180-4f2f-a526-d3f22687c650",
"kind": "sos",
"name": "Wondrous mathematics: A gentle introduction to P vs. NP, the greatest open question in computer science, the complexity zoo and galactic algorithms",
"slug": "wondrous-mathematics-a-gentle-introduction-to-p-vs",
"url": "https://api.events.ccc.de/congress/2025/event/c5b0284a-1180-4f2f-a526-d3f22687c650/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "see session description",
"language": "en",
"description": "📍 The location of this session might change, please check here again before the session starts. **The location is currently set to be [next to Pixelebbe](https://39c3.c3nav.de/l/c:2:134.03:163.63/) (Layer 2, G6).** We will sit on the floor and won't have much space because we don't want to obstruct escape routes.📍\r\n\r\nVery roughly, P is the class of efficiently solvable problems and NP is the class of non-efficiently solvable problems. A basic fact of life is P ≠ NP. However, for the last fifty years, this observation has stubbornly resisted every attempt of a proof. The talk will carefully explain:\r\n\r\n▸ what the precise statement of the conjecture P ≠ NP is\r\n\r\n▸ how the world would look like if P = NP\r\n\r\n▸ whether it might be that it's provable that the conjecture is unprovable (that the conjecture exceeds the boundaries of logic)\r\n\r\n▸ what's known about hypothetical proofs of P ≠ NP: the so-called relativization barrier every proof attempt needs to overcome\r\n\r\nThe P vs. NP question is embedded into a larger zoo of complexity classes, of which P and NP are only two members. We will also talk about:\r\n\r\n▸ recent insights on the relationship between time and memory\r\n\r\n▸ weird so-called galactic algorithms\r\n\r\nThis talk requires no mathematical prerequisites. Indeed, people who took classes on computability theory in university will be bored to hell and should only attend if they plan to support the session by offering interesting remarks. :-)\r\n\r\nTo enjoy and follow the talk, you should know that we use algorithms to solve computational problems and that some are more efficient than others. You'll be extra prepared if at some point in your life you've implemented some algorithms. That said, you will only enjoy the talk if you enjoy mathematical thinking and a certain amount of mathematical precision. This is not a light-and-fun talk, to the small extent that it's fun it's only thanks to the interesting theoretical relationships discussed in the talk.\r\n\r\n**[Transcript](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-27T14:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-27T15:20:00+01:00"
},
{
"id": "dc849670-02ed-41fe-b3df-3437f75716c1",
"kind": "sos",
"name": "Wondrous mathematics: How does artificial intelligence such as ChatGPT accomplish the feat of learning?",
"slug": "wondrous-mathematics-how-does-artificial-intellige",
"url": "https://api.events.ccc.de/congress/2025/event/dc849670-02ed-41fe-b3df-3437f75716c1/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
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"language": null,
"description": "Conventional computer algorithms are superior to the human intellect in many regards: for instance at multiplying large numbers or winning at chess by analyzing huge numbers of moves. But there are also many tasks which come naturally to us yet exceed the capabilities of algorithms by vast amounts: Rigid algorithms can't decipher human handwriting or drive cars.\r\n\r\nThe recent breakthroughs in artificial intelligence circumvent these barriers by employing quite a different approach: They use artificial neural networks, which are inspired by the partially-understood way the human brain works.\r\n\r\nThe unique feature of artificial neural nets is that they aren't rigid, but can learn. Human programmers specify their rough structure and supply training data, but don't write a single line of code governing their behavior.\r\n\r\n**In the spirit of a good Unix command-line tool, this talk aspires to explain one thing and explain it well: How do artificial neural nets accomplish the feat of learning?**\r\n\r\nWe'll learn that the answer is related to a mathematical breakthrough made at the end of the 17th century and discuss why deep learning only surged in the last few years, even though the basics of artificial neural nets were already understood in the 1980s. We'll also touch upon some of the greatest problems of neural nets, which emerge directly from the way neural nets learn.\r\n\r\nThe talk doesn't require any advanced knowledge of mathematics. If you're already familiar with Michael Nielsen's book, then don't expect to learn anything new and come to this talk only if you want to contribute interesting remarks. The talk has the goal of making the other neural network talks more accessible.\r\n\r\n**[Transcript](https://chaos.quasicoherent.io/)**",
"schedule_start": "2025-12-28T18:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T19:20:00+01:00"
},
{
"id": "19a352a1-fc5c-4fbd-84f2-3b77b90663c6",
"kind": "sos",
"name": "Woodpecker CI meetup",
"slug": "woodpecker-ci-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/19a352a1-fc5c-4fbd-84f2-3b77b90663c6/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "c-base (next to the big nix flag)",
"language": null,
"description": "@6543 will introduce Woodpecker-CI to the interested parties and answer questions.\r\n\r\nAnyone who uses Woodpecker-CI and is interested in it can come and/or also welcome to ask in-depth questions.\r\n\r\nIt should be a relaxed exchange session without obligation and agenda.",
"schedule_start": "2025-12-29T15:30:00+01:00",
"schedule_duration": "01:10:00",
"schedule_end": "2025-12-29T16:40:00+01:00"
},
{
"id": "2ca08785-40e4-4645-a3c1-0ee74eea9bc7",
"kind": "sos",
"name": "Working With (and Around) Research Infrastructure for Excellent Citizen Science – Understanding User Stories and Needs",
"slug": "how-research-tools-actually-break-user-stories-fro",
"url": "https://api.events.ccc.de/congress/2025/event/2ca08785-40e4-4645-a3c1-0ee74eea9bc7/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en, de",
"description": "## Session Description\r\n\r\nWe constantly build, use, maintain, and adapt physical and digital tools and infrastructures — both inside and outside formal institutions, and far beyond classical environmental citizen science.\r\n\r\nThis session invites participants involved in **community projects** to share concrete **user stories** about how they actually work:\r\n- what they try to do,\r\n- what doesn’t work,\r\n- what they avoid using,\r\n- what they need,\r\n- and why.\r\n\r\nRather than presenting solutions or pitching an infrastructure, the session focuses on:\r\n\r\n### Session Focus\r\n- **Lived practices and workflows**\r\n- **Shared experiences and bottlenecks** in maintaining infrastructure\r\n- **Research activities within communities**, including success stories\r\n- **Trust issues and refusals** related to infrastructure services\r\n- **Boundaries around data, governance, and centralisation**, with concrete project examples\r\n\r\n### Method\r\nParticipants will fill in short **user stories based on real situations**. \r\nThese stories will be **anonymised** and analysed to identify patterns that can inform the **early design of a future research infrastructure (RIECS)** — before assumptions harden into technical or governance choices.\r\n\r\n---\r\n\r\n## About the Project\r\n\r\n**RIECS-Concept Project** (CORDIS) \r\n🔗 https://cordis.europa.eu/project/id/101188210/de\r\n\r\n### Connect with RIECS-Concept\r\nFollow us on Mastodon: \r\n🔗 https://mastodon.social/@riecs_concept\r\n\r\n---\r\n\r\n## Get Involved\r\n\r\n**Shape the future of Research Infrastructure for Excellent Citizen Science in Europe**\r\n\r\n👉 Sign up to be interviewed: \r\n🔗 https://forms.gle/uVpB2uL6j8eufdZVA",
"schedule_start": "2025-12-30T10:30:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-30T11:20:00+01:00"
},
{
"id": "327799ca-c91a-47fc-a47a-fb3431a5534f",
"kind": "sos",
"name": "WTF, nochmal das Ganze?",
"slug": "wtf-nochmal-das-ganze_rvsg",
"url": "https://api.events.ccc.de/congress/2025/event/327799ca-c91a-47fc-a47a-fb3431a5534f/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "de, en",
"description": "The system of harassing payment cards for people receiving asylum seeker benefits is not a new idea, but has been dusted off from the 1990s/2000s. But even back then, there was resistance – and it was anything but boring!\r\nRevel in the old days with us and be inspired by past actions and successes!\r\n\r\nWe show pictures of the initiative against the chip card system in Berlin, which was active there mainly in the noughties against the precursors of today's payment cards.",
"schedule_start": "2025-12-27T13:30:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-27T13:55:00+01:00"
},
{
"id": "f9e3dcd8-d398-4ee9-8bf4-b449f9f06b14",
"kind": "sos",
"name": "WTF, nochmal das Ganze? II",
"slug": "wtf-nochmal-das-ganze-ii",
"url": "https://api.events.ccc.de/congress/2025/event/f9e3dcd8-d398-4ee9-8bf4-b449f9f06b14/?format=api",
"track": null,
"assembly": "sos",
"room": "ce20bae4-fc3a-46e2-8608-be3caa7fa20d",
"location": null,
"language": "de",
"description": "The system of harassing payment cards for people receiving asylum seeker benefits is not a new idea, but has been dusted off from the 1990s/2000s. But even back then, there was resistance—including in Thuringia!\r\n\r\nWe are showing “Change?! – No way!”, a 25-minute documentary by Filmpirat*innen about the voucher system for refugees. Using hidden cameras, the film pirates in Thuringia accompanied refugees while shopping to show the everyday, discriminatory madness at supermarket checkouts when vouchers have to be “used up” during a shopping trip or dictionaries “can't be bought with vouchers.” But they also show the everyday solidarity of people who exchange vouchers 1:1 for cash in exchange initiatives and do not stop there, but generally demand the abolition of the voucher practice – the precursor to today's payment cards.",
"schedule_start": "2025-12-29T00:00:00+01:00",
"schedule_duration": "00:25:00",
"schedule_end": "2025-12-29T00:25:00+01:00"
},
{
"id": "e9a0fb45-97cb-4619-8b46-b249cc196673",
"kind": "sos",
"name": "Yerba Mate Meetup",
"slug": "yerba-mate-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/e9a0fb45-97cb-4619-8b46-b249cc196673/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "House of Tea",
"language": "de, en",
"description": "Let us enjoy a mate together and share some stories. Bring your own mate and yerba, if you have. All creatures welcome.\r\n\r\nTomemos mate y charlemos un rato. Si tenés, traiga tu propio mate y yerba. ¡Todos las criaturas son bienvenidos!",
"schedule_start": "2025-12-29T12:15:00+01:00",
"schedule_duration": "01:00:00",
"schedule_end": "2025-12-29T13:15:00+01:00"
},
{
"id": "c102d2a8-d3fd-42f2-bb82-48a09e3c85c7",
"kind": "sos",
"name": "Yes, even you can harden your systemd services!",
"slug": "yes-even-you-can-harden-your-systemd-services",
"url": "https://api.events.ccc.de/congress/2025/event/c102d2a8-d3fd-42f2-bb82-48a09e3c85c7/?format=api",
"track": null,
"assembly": "sos",
"room": "d477e5d4-4700-4317-896c-ca39c0720eed",
"location": null,
"language": "en",
"description": "systemd offers lots of low-effort features for hardening services, but they're only slowly gaining adoption even though they are relatively simple to use. I'd like to introduce the essential options for hardening a systemd service, taking into account some interesting possibilities that arise when at least parts of the system are completely immutable, such as on NixOS.",
"schedule_start": "2025-12-28T17:00:00+01:00",
"schedule_duration": "00:50:00",
"schedule_end": "2025-12-28T17:50:00+01:00"
},
{
"id": "c527d492-7ad2-40b0-9503-d57710e3ce29",
"kind": "sos",
"name": "Young Queer Gathering (aka. Twink Meetup)",
"slug": "young-queer-gathering-aka-twink-meetup",
"url": "https://api.events.ccc.de/congress/2025/event/c527d492-7ad2-40b0-9503-d57710e3ce29/?format=api",
"track": null,
"assembly": "sos",
"room": null,
"location": "Glass front, 2nd floor, https://39c3.c3nav.de/l/c:2:197.14:136.4/",
"language": "de, en",
"description": "The Original: Meetup for all the young queers! (T.rans W.o.man I.nter N.onbinary K.inky S.hy; aka. former \"former Twink Meetup\")\r\n\r\nLet's continue our tradition started at the 34C3. Establishing new friendships, find old ones again, exchanging cuddles, talk about life and relationships. We try to be newbie- and introvert-friendly, so you can come even if you don't know anybody yet! (recommended age: ~ 18 - 39)\r\n\r\nMeeting point:\r\n\r\nGlass front at the escalators in the entrance area, 2nd floor. So you can join or leave anytime you want.\r\nhttps://39c3.c3nav.de/l/c:2:197.14:136.4/\r\n\r\nRespect the Code of Conduct - Be Excellent To Each Other!\r\nThe Awareness-Team (DECT 113) can help.",
"schedule_start": "2025-12-28T18:20:00+01:00",
"schedule_duration": "00:40:00",
"schedule_end": "2025-12-28T19:00:00+01:00"
}
]
