BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//39th Chaos Communications Congress//Critical Decentralisation Cl
 uster's events
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Critical Decentralisation Cluster's events
BEGIN:VEVENT
SUMMARY:Intro to the Critical Decentralization Cluster
DTSTART:20251227T100000Z
DTEND:20251227T101000Z
DTSTAMP:20260406T113019Z
UID:52fff0c0-2470-5ca0-b409-42df8d597649
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/intro-to-the-crit
 ical-decentralization-cluster
END:VEVENT
BEGIN:VEVENT
SUMMARY:The CDC Badge: conference badge & devboard with TROPIC01 and ESP32
 -S3
DTSTART:20251227T101000Z
DTEND:20251227T105000Z
DTSTAMP:20260406T113019Z
UID:c5330358-1304-59c6-931d-31f8b53ae8a6
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/the-cdc-badge-con
 ference-badge-devboard-with-tropi
END:VEVENT
BEGIN:VEVENT
SUMMARY:OpenPGP 2025: Zero → Hero
DTSTART:20251227T110000Z
DTEND:20251227T130000Z
DTSTAMP:20260406T113019Z
UID:b774ae35-a6be-509f-808a-2e4aeb71df6f
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/openpgp-2025-zero
 -hero
END:VEVENT
BEGIN:VEVENT
SUMMARY:What’s Next with Open Hardware at FOSSASIA and Beyond
DTSTART:20251227T130000Z
DTEND:20251227T133000Z
DTSTAMP:20260406T113019Z
UID:472259a3-7191-54d4-8ed8-3e2365fed7f0
CATEGORIES:
DESCRIPTION:In 2025\, teams at FOSSASIA initiated several open hardware pr
 ojects developed entirely from the ground up\, including a new ARM based P
 ocket Science Lab\, an updated LED Badge platform\, and an NFC powered ePa
 per badge enabling energy independent content transfer. However\, this ses
 sion goes beyond a project update. It situates these developments within a
  wider global movement of open hardware initiatives across Asia\, Europe\,
  and other regions. Drawing on experiences from FOSSASIA as well as broade
 r perspectives from the international open hardware community\, the talk e
 xamines where open hardware is heading as a decentralised\, collaborative 
 practice. With input from international experts and community contributors
 \, the session will explore trends emerging\, including evolving manufactu
 ring models\, open silicon and firmware stacks\, supply chain resilience\,
  and the realities of sustaining openness at scale.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/whats-next-with-o
 pen-hardware-at-fossasia-and-beyo
END:VEVENT
BEGIN:VEVENT
SUMMARY:SeedSigner DIY Bitcoin signing device build workshop
DTSTART:20251227T133000Z
DTEND:20251227T153000Z
DTSTAMP:20260406T113019Z
UID:fe789c4d-9b9b-5a9d-b2dd-aeb6dc6bc59d
CATEGORIES:
DESCRIPTION:Seedsigners are open-source DIY signing devices which can be b
 uilt using "normal" hardware like a Raspberry Pi and act as kind of hardwa
 re wallets to sign Bitcoin transactions. Since the hardware is missing a s
 ecure element chip\, the keys are saved externally\, usually via self-draw
 n QR-codes which are read again for every use via the build-in camera.\n\n
 We brought a few kits with us which we sell for 45€ and build together. 
 We will solder the 40pin GPIO header to the Raspberry Pi Zero\, flashing t
 he firmware on the MicroSD card and then build everything together in the 
 3d-printed enclosure.\n\nThe kit includes:\nRaspberry Pi Zero 1.3 (without
  Wifi or Bluetooth chip)\, GPIO-header to solder\nDisplay-Hat with joystic
 k and buttons\nCamera\n64GB MicroSD card\nMicroUSB to USB-C cable\n3D prin
 ted enclosure\n6 printed templates for self-drawn QR-Codes
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/seedsigner-diy-bi
 tcoin-signing-device-build-worksh
END:VEVENT
BEGIN:VEVENT
SUMMARY:Software Liberation Toolbox Exchange
DTSTART:20251227T153000Z
DTEND:20251227T163000Z
DTSTAMP:20260406T113019Z
UID:b818c405-71b9-57cd-996d-beaf40c75b5e
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/software-liberati
 on-toolbox-exchange
END:VEVENT
BEGIN:VEVENT
SUMMARY:Update 2025. Digital integrity of the human person\, A new fundame
 ntal right.
DTSTART:20251227T163000Z
DTEND:20251227T170000Z
DTSTAMP:20260406T113019Z
UID:e12de982-7439-548a-aed4-5d5a3ffd4699
CATEGORIES:
DESCRIPTION:Every human evolves today in multi-dimensional physical and di
 gital environment. If each individual is to keep its individuality and aut
 onomy in its choices\, it must be protected and given effective tools to d
 efend its own autonomy.\n\nRecognizing that human life has been digitally 
 extended must question ourselves on what makes us human today. Should pers
 onal data be considered as component of the person\, rather than objects t
 hat can be owned by whoever collects that data? Should our digital integri
 ty be protected?\n\nIf each human person already has a right to physical a
 nd mental integrity (Swiss Constitution article 10 al.2)\, shouldn’t it 
 have a right to digital integrity?\n\nAlexis Roussel has been co-authoring
  a book on the right to Digital Integrity. He is an advocate in digital pu
 blic policies in Switzerland.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/update-2025-digit
 al-integrity-of-the-human-person-
END:VEVENT
BEGIN:VEVENT
SUMMARY:Recap and precap of Critical Decentralization Cluster sessions
DTSTART:20251227T172500Z
DTEND:20251227T173000Z
DTSTAMP:20260406T113019Z
UID:4f430591-a6ec-51cf-a580-8b1917394c98
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/recap-and-precap-
 of-critical-decentralization-clus
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Mask-Off Moment for Digital Identity
DTSTART:20251227T173000Z
DTEND:20251227T180000Z
DTSTAMP:20260406T113019Z
UID:85f3cd1a-fe3a-56f8-8b41-aa7a75ce8f28
CATEGORIES:
DESCRIPTION:Despite decades of cryptography\, security practice\, and best
  practice deployment\, digital identity remains the weakest link in system
 s design because its core terms stay vague while its consequences are conc
 rete. What does it actually take to assemble a digital identity? What do d
 ifferent implementations share\, even when they claim to be radically diff
 erent? And what happens when those definitions are left elastic enough to 
 serve whoever holds power?\n\n"The mask-off moment" tracks the convergence
  of capability (biometrics\, sensors\, AI triage\, mass digitisation)\, in
 stitutional incentives (risk scoring\, eligibility gates\, compliance auto
 mation)\, and political will. The result is an emerging form of bureaucrat
 ic violence we are not prepared to name\, much less govern.\n\nThis talk t
 races how digital identity became weapon-ready through optimistic framing 
 and opportunistic ambiguity\, then offers a concrete frame to interrogate 
 any proposal: what it will do on its best day\, what it will do on its wor
 st day\, and which parts of the system will be impossible to “add accoun
 tability to later.” The intended audience is policymakers\, technologist
 s\, designers\, and civil-society people who are tired of vague promises a
 nd want a usable model that survives contact with reality.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/the-mask-off-mome
 nt-for-digital-identity
END:VEVENT
BEGIN:VEVENT
SUMMARY:Breaking into Wireless Smart Homes\, Z-Wave example
DTSTART:20251227T180000Z
DTEND:20251227T183000Z
DTSTAMP:20260406T113019Z
UID:fc95c6d0-b427-5110-81a5-62504dc1ce8d
CATEGORIES:
DESCRIPTION:You will learn:\n- security mechanisms and algorithms used in 
 modern IoT smart home and smart building protocols and how they evolved\,\
 n- various ways to break existing Z-Wave networks (DDOS or key stealing du
 ring inclusion)\,\n- new features in Z-Wave and Z-Wave Long Range protocol
  closing the described holes\,
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/breaking-into-wir
 eless-smart-homes-z-wave-example
END:VEVENT
BEGIN:VEVENT
SUMMARY:Namecoin and Tor PKI 2025
DTSTART:20251227T183000Z
DTEND:20251227T190000Z
DTSTAMP:20260406T113019Z
UID:8ee9d576-ecb3-51b9-b6d1-2308a2d5a907
CATEGORIES:
DESCRIPTION:Topics to be covered include:\n\n* How we can use Namecoin as 
 a PKI with ~0 bytes of blockchain overhead.\n* How Namecoin's smart contra
 ct functionality (allowing multisig and timelocks to control updating a na
 me) interacts with PKI use cases.\n* How we generalized Namecoin and Tor P
 KI to work with non-TLS protocols.\n* How revocations can be handled secur
 ely.\n* How we ensured anonymity (including Tor stream isolation) despite 
 TLS implementations not providing API's for this.\n* How the anonymity pro
 tections actually *improved* performance.\n* How all of the above interope
 rates with existing software.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/namecoin-and-tor-
 pki-2025
END:VEVENT
BEGIN:VEVENT
SUMMARY:How to Contribute to Open Source Projects: Stack Wallet\, Monero\,
  Tor (Arti!)
DTSTART:20251227T190000Z
DTEND:20251227T193000Z
DTSTAMP:20260406T113019Z
UID:72e670d3-7a90-5874-8f88-cbffe59e57e8
CATEGORIES:
DESCRIPTION:Starting with Tor and The Tor Project's new Rust project Arti 
 (A Rust Tor Implementation)\, we'll walk through how to build\, set up for
  development\, and submit Pull Requests which have a good chance of being 
 accepted.  We'll proceed to Monero development\, both for the original C++
  codebase as well as the newer Cuprate project\, a Rust Monero implementat
 ion\, and what's coming for both.  Finally\, we'll look at how Stack Walle
 t incorporates and provides a UX for both Tor and Monero.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/how-to-contribute
 -to-open-source-projects-stack-wa
END:VEVENT
BEGIN:VEVENT
SUMMARY:"What can a mixnet do? Strategies for network-level anonymity"
DTSTART:20251227T193000Z
DTEND:20251227T213000Z
DTSTAMP:20260406T113019Z
UID:aa332267-221e-55ea-baae-b63eee8545b8
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/what-can-a-mixnet
 -do-strategies-for-network-level-
END:VEVENT
BEGIN:VEVENT
SUMMARY:Intro to the Critical Decentralization Cluster
DTSTART:20251228T095000Z
DTEND:20251228T100000Z
DTSTAMP:20260406T113019Z
UID:efda9e93-97d4-5833-b91c-bec7cedb3d19
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/intro-to-the-crit
 ical-decentralization-cluste_df6i
END:VEVENT
BEGIN:VEVENT
SUMMARY:Intro to Tropicsquare TROPIC01 Workshops at CDC
DTSTART:20251228T100000Z
DTEND:20251228T102000Z
DTSTAMP:20260406T113019Z
UID:81efde89-e887-526a-b12e-14da8d822bc6
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/intro-to-tropicsq
 uare-tropic01-workshops-at-cdc
END:VEVENT
BEGIN:VEVENT
SUMMARY:Open Legal Q&A with Judith de Boer: "Can I Get Arrested for Writin
 g Code?"
DTSTART:20251228T100000Z
DTEND:20251228T110000Z
DTSTAMP:20260406T113019Z
UID:8e705309-d766-5ad7-9ab7-80422c1c171c
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/open-legal-qa-wit
 h-judith-de-boer-can-i-get-arrest
END:VEVENT
BEGIN:VEVENT
SUMMARY:Programming with the TROPIC01 open architecture secure element
DTSTART:20251228T100000Z
DTEND:20251228T120000Z
DTSTAMP:20260406T113019Z
UID:1f4b0457-28f0-5ae2-bf17-866d1aeda0a9
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/programming-the-t
 ropic01-open-source-secure-elemen
END:VEVENT
BEGIN:VEVENT
SUMMARY:iroh p2p chat over gossip
DTSTART:20251228T113000Z
DTEND:20251228T133000Z
DTSTAMP:20260406T113019Z
UID:b76f1718-fbb1-5dfc-90ee-d6fd8b961d3c
CATEGORIES:
DESCRIPTION:iroh is a library to establish direct connections between two 
 peers. The workshop will start with an overview of how iroh works and what
  it provides. After this we'll explore establishing connections between tw
 o endpoints before progressing to using a gossip protocol to send messages
  to multiple peers. At the end we should have a simplistic group chat appl
 ication.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/iroh-p2p-chat-ove
 r-gossip
END:VEVENT
BEGIN:VEVENT
SUMMARY:The DarkFi super-app
DTSTART:20251228T123000Z
DTEND:20251228T130000Z
DTSTAMP:20260406T113019Z
UID:38fcf304-2754-5d8f-9985-e77536442084
CATEGORIES:
DESCRIPTION:Hi\,\n\nmy name is Yuki and I am part of the DarkFi community.
  Out of this user/community perspective I will tell you something about th
 e philosophy of DarkFi\, the anonymous tech-stack\, Lunarpunk\, the Desert
  vs Forest\, RegFi vs DarkFi and the DarkFi Vision.\n\nThe talk will not g
 o to deep in the low level tech\, because I am also just learning about th
 em :)\n\nI plan to keep the talk short and have a Q&A personally after the
  talk\, in a more 'relaxed' environment. \n\nnote: As you might expect\, t
 he talk will be held in english. But I can also speak german\, if needed f
 .e\n\nP.S: This is the first talk I will hold\, I am very excited :)
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/the-darkfi-super-
 app
END:VEVENT
BEGIN:VEVENT
SUMMARY:Embedding Anonymity Directly in your Application
DTSTART:20251228T133000Z
DTEND:20251228T153000Z
DTSTAMP:20260406T113019Z
UID:f37104e3-211a-58af-a952-5a5c8377e724
CATEGORIES:
DESCRIPTION:Anonymity is more important than ever\, and it's not an easy j
 ob. Our job is to make it easier! The I2P project is excited to demonstrat
 e 2 new projects\, the `go-i2p` and `emissary` embedded router projects. W
 e'll look at how they work and why they're an easier\, more accessible way
  of providing anonymity to your users than freestanding external services.
  Primary target audience is Go\, Rust\, and C developers\, I2P library dev
 elopers\, and people working on anonymous P2P applications.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/embedding-anonymi
 ty-directly-in-your-application
END:VEVENT
BEGIN:VEVENT
SUMMARY:Making own Z-Wave (or Zigbee) device from scratch and assemble a Z
 -Wave (or Zigbee/Matter) controller
DTSTART:20251228T150000Z
DTEND:20251228T170000Z
DTSTAMP:20260406T113019Z
UID:f3b2f75d-bcc9-5896-bdd0-020ee88a3938
CATEGORIES:
DESCRIPTION:We will be making own Z-Wave and Z-Wave Long Range devices Z-W
 ave Open Source SDK an Trident IoT SDK. It will also be possible to do Zig
 bee devices.\n\nWe will program a sensor and a switch using Z-Wave protoco
 l and include it in a Z-Wave network. Or Zigbee.\n\nWe will also browse th
 e Z-Wave Open Source project\, and how existing Trident IoT and SiLabs cod
 e differ from them.\n\nWe will also install Linux version of Z-Way - Z-Wav
 e/Zigbee/Matter Smart Home Controller. You will learn basics of Z-Wave and
  Z-Wave Long Range\, how to include devices and set up security schemes.\n
 \nWe will also master using Z-Way smart home controller\, investigate it's
  API and create own Linux or ESP32-based Z-Wave or Zigbee controller. We w
 ill also discuss Z-Wave/Zigbee-to-Matter bridging.\n\nYou will need a lapt
 op (Linux\, Mac or Windows) with SSH client\, USB A\, Google Chrome and in
 ternet access. Optionally you can use VS Code (install Trident IoT extensi
 on).\n\nBring your Z-Wave devices with you! If you have Home Assistant Con
 nect ZWA-2\, take it too!\n\nPresentation: https://docs.google.com/present
 ation/d/1EJFr8toheFOOE_k4l23wkLd98NE8yb8UbnnkNd2UKqU
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/making-own-z-wave
 -or-zigbee-device-from-scratch-an
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zero-Knowledge Proofs Workshop
DTSTART:20251228T153000Z
DTEND:20251228T163000Z
DTSTAMP:20260406T113019Z
UID:18e536a7-4688-563c-a165-ea7d5e6fc8d0
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/zero-knowledge-pr
 oofs-workshop
END:VEVENT
BEGIN:VEVENT
SUMMARY:Radicle: P2P\, Censorship-Resistant Code Collaboration Based on Gi
 t
DTSTART:20251228T163000Z
DTEND:20251228T170000Z
DTSTAMP:20260406T113019Z
UID:5bf7ce29-ffb1-51df-ba8f-9864b23f58d4
CATEGORIES:
DESCRIPTION:Today\, much of the open-source ecosystem depends on a few cen
 tralized code forges\, even though modern version control systems are desi
 gned with fully distributed collaboration in mind.\nThis creates questiona
 ble dependencies with regards to governance and supply-chain security.\nIn
  this talk\, we explore an alternative: [Radicle](https://radicle.xyz/)\, 
 a decentralized\, peer-to-peer code collaboration stack built on Git\, tha
 t empowers developers to work together while staying sovereign.\n\nUnlike 
 traditional\, centralized code forges that can impose censorship\, Radicle
  ensures that each user retains control over their data\, interactions\, a
 nd collaboration\, free from corporate influence.\nThis aligns with broade
 r movements toward decentralization\, open-source software\, and the democ
 ratization of internet services.\n\nWe introduce the system\, provide a pr
 ogress update\, and share what we are currently working on.\n\nAttendees g
 ain a comprehensive understanding of Radicle’s technical architecture\, 
 its practical benefits for decentralized code collaboration\, and how it c
 ontributes to a more autonomous and resilient future for open-source devel
 opment.\n\nFind out more:\n - [FAQ of the project (radicle.xyz)](https://r
 adicle.xyz/faq)\n - [*How we built a gossip layer and CRDT on top of Git* 
 by Alexis Sellier at GitMerge 2024 (youtube.com)](https://www.youtube.com/
 watch?v=tsVa53SPIHc)\n - [Release Notes for 1.0 (radicle.xyz)](https://rad
 icle.xyz/2024/09/10/radicle-1.0.html)\n - [radicle.zulipchat.com](https://
 radicle.zulipchat.com)d\n\n*Free your code!*
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/radicle-p2p-censo
 rship-resistant-code-collaboratio
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Bitcoin Security Budget and Its Implications A Look at the Sec
 urity\, Scaling and Spam Resistance of Proof of Work Cryptocurrencies
DTSTART:20251228T170000Z
DTEND:20251228T174000Z
DTSTAMP:20260406T113019Z
UID:1c7a26ad-1d1d-53f2-aa09-23e623b6fa3e
CATEGORIES:
DESCRIPTION:Satoshi Nakamoto released Bitcoin: A Peer-to-Peer Electronic C
 ash System\, in October 2008\, https://bitcoin.org/bitcoin.pdf\,  during t
 he 2008 financial crisis. The Bitcoin genesis block was mined in January 2
 009 launching the Bitcoin network. The design of Bitcoin has a maximum mon
 ey supply of 21 million Bitcoin (BTC). The security budget consisting of t
 he block reward and transaction fees per block is paid to the miner (creat
 or) of each block as an incentive to secure the network. The blocks in Bit
 coin are approximately every 10 minutes. The block reward is required by c
 onsensus to halve approximately every 4 years\, starting at 50 BTC per blo
 ck in 2009\, and is currently at 3.125 BTC per block. This leads to a curr
 ent annual growth rate of the total Bitcoin money supply that is below 1%.
  The next halving to 1.5625 BTC is estimated to occur in April of 2028. Tr
 ansaction fees are currently less than 1% of the total Bitcoin security bu
 dget. \n\nIt is claimed in section 6 of the Bitcoin whitepaper that:\n\n 
 “Once a predetermined number of coins have entered circulation\, the inc
 entive can transition entirely to transaction fees and be completely infla
 tion free”\; \n\nhowever no evidence\, theory or references are provided
  to support this claim. \n\nThe above model\, with some variations\, has b
 een followed by most of the top proof of work cryptocurrencies\, including
  Bitcoin Cash (BCH)\, Litecoin (LTC)\, and ZCash (ZEC). There are however 
 some notable exceptions\, Dogecoin (DOGE) and Monero (XMR). Both Dogecoin 
 and Monero have fixed block rewards. In Dogecoin this was the result of a 
 bug in the code\; however in Monero a fixed minimum block reward or tail e
 mission was deliberately set at the constant rate 0.6 XMR per block. The b
 locks in Monero are approximately every 2 minutes. This leads to an annual
  growth rate of the total Monero money supply that is below 1%. For compar
 ison the historical annual compounded rate of growth of the gold money sup
 ply is close to 1%.\n\nThe fee market in a cryptocurrency is also highly d
 ependent on whether the blocksize is fixed\, as in  Bitcoin\, Dogecoin\, L
 itecoin and ZCash or adaptive as in Bitcoin Cash and Monero. In the case o
 f adaptive blocksizes the question becomes: Is there a penalty (cost) to i
 ncrease the blocksize as in Monero or no cost to increase the blocksize as
  in Bitcoin Cash?\n\nA balance needs to be found in the design of a crypto
 currency between allowing for blocksize growth in order to support the tra
 nsaction demand for peer to peer electronic cash\, and the necessity of sp
 am mitigation.   The use of privacy preserving technologies can also have 
 a profound impact on this balance\, by increasing the transaction size\, w
 hile at the same time preventing the use of censorship\, as a means of spa
 m mitigation. In Monero for example this increase will be by a factor of a
 round 20 times\, after the upcoming Full Chain Membership Proofs\, plus pl
 us (FCMP++) hard fork. This makes finding this balance in cryptocurrencies
  such as Monero with no option to opt out of privacy\, by far the hardest.
  On the other hand a solution that works in Monero will also work in a cry
 ptocurrency with a lesser degree of privacy. \n\nIn the presentation we wi
 ll discuss the following questions:\nHow do the various types of fee marke
 ts: fixed blocksize\, adaptive blocksize with penalty\, and adaptive block
 size without penalty work?\nCan transaction fees replace the falling block
  rewards or are fixed block rewards necessary?\nAre there advantages or di
 sadvantages to replacing block rewards with transaction fees?\nIs it possi
 ble to have a fixed block reward and still be inflation free? \nDo we have
  a peer-to-peer electronic cash system or just another kind of asset for i
 nvestment and speculation using centralized financial institutions?\nIs a 
 worldwide peer-to-peer electronic cash system possible now or in the fores
 eeable future?\n\nWe will also discuss some of the broader implications
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/the-bitcoin-secur
 ity-budget-and-its-implications-a
END:VEVENT
BEGIN:VEVENT
SUMMARY:Radicle: Setup and Introduction
DTSTART:20251228T170000Z
DTEND:20251228T190000Z
DTSTAMP:20260406T113019Z
UID:66debe2d-84ca-5350-95af-7d1af9de73af
CATEGORIES:
DESCRIPTION:Attend this workshop if you would like to try out Radicle. We'
 ll set it up\, and learn how to replicate a Git repository of your choice 
 on the network. Further\, learn how to use Radicle Patches and Radicle Iss
 ues for collaboration.
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/radicle-setup-and
 -introduction
END:VEVENT
BEGIN:VEVENT
SUMMARY:Real World Timestamping With OpenTimestamps
DTSTART:20251228T180000Z
DTEND:20251228T183000Z
DTSTAMP:20260406T113019Z
UID:d02f5178-f72a-5e59-83d1-fe70f689e3b8
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/real-world-timest
 amping-with-opentimestamps
END:VEVENT
BEGIN:VEVENT
SUMMARY:Recap and precap of Critical Decentralization Cluster sessions
DTSTART:20251228T185500Z
DTEND:20251228T190000Z
DTSTAMP:20260406T113019Z
UID:2be7ff6f-0d6f-5a12-8a4b-ec45281c11f5
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/recap-and-precap-
 of-critical-decentralization_ct48
END:VEVENT
BEGIN:VEVENT
SUMMARY:Passkeys : the good\, the bad\, the ugly
DTSTART:20251228T190000Z
DTEND:20251228T193000Z
DTSTAMP:20260406T113019Z
UID:8ec7a7ac-a2bb-5771-ab5f-e0e87ed7c84d
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/passkeys-the-good
 -the-bad-the-ugly
END:VEVENT
BEGIN:VEVENT
SUMMARY:P2P μVMs: pluralistic composability & interoperability for decent
 ralized networks & applications
DTSTART:20251228T190000Z
DTEND:20251228T210000Z
DTSTAMP:20260406T113019Z
UID:851d516d-740b-5f37-b1cb-d144d2696f59
CATEGORIES:
DESCRIPTION:## Topics\n\n- μVMs & unikernels\n- pluralistic composability
  via minimalistic & layered protocol design\n- decentralized applications 
 & services running in cryptographically addressed μVMs\n- using well-know
 n protocols as unified message passing mechanism for decentralized applica
 tions\n- pluralism on the P2P transport\, overlay\, and application layers
 \n\n## Format\n\nShort introduction followed by a discussion between resea
 rchers & developers working on projects related to μVMs\, P2P/NGI protoco
 ls\, and their intersection.\n\n## Context\n\nSee [WaxOS](https://WaxOS.ne
 t) for a brief overview of ongoing research.
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/p2p-vms-pluralist
 ic-composability-interoperability
END:VEVENT
BEGIN:VEVENT
SUMMARY:DIY Bioreactors for mycology and biohacking
DTSTART:20251228T193000Z
DTEND:20251228T200000Z
DTSTAMP:20260406T113019Z
UID:5287a06c-cc15-571c-a4fd-4f716631fac2
CATEGORIES:
DESCRIPTION:Mycology is one of the fastest growing hobbies in the biohacki
 ng/microbiology scene\, people cultivate and grow mushrooms for their tast
 e\, nootropic properties\, and even as construction materials.\n\nBioreact
 ors\, while rarely found on a hobbyist's desk - are the proper way to carr
 y out cultivation and innoculation of micro-organism. This talk will expla
 in their principles in simple terms\, as well as showing off the speaker's
  journey building a reproducible and affordable reactor.\n\nBioreactors ar
 e not usually found in hobbyists mushroom growers yet they enable:\n- Very
  fast culture times compared to usual jars\n- Efficient and sterile innocu
 lation and expansion\n- Cultivation not just of mycelium\, but of any micr
 oorganism such as algae\, or even insulin producing bacteria\n\nThe demons
 trator that will be presented enables not only cultivation of mycelium of 
 all types\, but also cultivation of complex micro-organisms such as insuli
 n-producing bacteria\, and other DIY-medicine goals.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/diy-bioreactors-f
 or-mycology-and-biohacking
END:VEVENT
BEGIN:VEVENT
SUMMARY:"Referendum Citoyen" the revolutionnary app
DTSTART:20251228T200000Z
DTEND:20251228T203000Z
DTSTAMP:20260406T113019Z
UID:09d208db-424d-5cd5-9fac-47c5c36022d4
CATEGORIES:
DESCRIPTION:The voting app is a simple blockchain voting app\, based on ZK
  proof generated from a french ID card. The presentation will deep dive in
  the tech part\, first but also present the social movement that wants to 
 bring the referendum culture in France through a voting system that is ind
 ependent from the State infrastructure\, but still can prove that voters a
 re french with the ID digital signature.\nThe voting app is Work in Progre
 ss and needs a lot of work. This is also an open call for hackers to help 
 improve and make the app the easiest app for people.\n\nhttps://github.com
 /ReferendumCitoyen/referendum-citoyen-react-native
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/referendum-citoye
 n-the-revolutionnary-app
END:VEVENT
BEGIN:VEVENT
SUMMARY:XMPP and metadata
DTSTART:20251228T210000Z
DTEND:20251228T213000Z
DTSTAMP:20260406T113019Z
UID:7244e819-2373-59ed-a745-c8953f1874f2
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/xmpp-and-metadata
END:VEVENT
BEGIN:VEVENT
SUMMARY:New features in Bitcoin self-custody
DTSTART:20251228T210000Z
DTEND:20251228T214500Z
DTSTAMP:20260406T113019Z
UID:1b7389b4-b5dd-583d-af56-5fc629c86198
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/new-features-in-b
 itcoin-self-custody
END:VEVENT
BEGIN:VEVENT
SUMMARY:GNU Boot install party
DTSTART:20251228T213000Z
DTEND:20251229T013000Z
DTSTAMP:20260406T113019Z
UID:2c6aa023-a1e0-59f8-919d-353bf9cc3248
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/gnu-boot-install-
 party
END:VEVENT
BEGIN:VEVENT
SUMMARY:Welcome to CDC day 3
DTSTART:20251229T092500Z
DTEND:20251229T093000Z
DTSTAMP:20260406T113019Z
UID:f72a1a4f-5656-57cc-ad7e-7d1e32b13a8b
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/intro-to-cdc
END:VEVENT
BEGIN:VEVENT
SUMMARY:Getting started with the Pocket Science Lab
DTSTART:20251229T093000Z
DTEND:20251229T113000Z
DTSTAMP:20260406T113019Z
UID:17f71125-5e40-599d-802f-3b884d91ffdf
CATEGORIES:
DESCRIPTION:Learn how to use the PSLab's range of onboard instruments to m
 ake measurements and output control signals.\n\nThis workshop will walk yo
 u through how to:\n- Measure voltage and resistance using the multimeter\n
 - Measure time-series voltage with the oscilloscope\n- Measure time-series
  digital signals with the logic analyzer\n- Output variable voltage with t
 he signal generator\n- Output digital signals with the PWM generator\n\nCh
 oose between using the Python API or the Android application\, or both!
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/getting-started-w
 ith-the-pocket-science-lab
END:VEVENT
BEGIN:VEVENT
SUMMARY:Making own Z-Wave (or Zigbee) device from scratch and assemble a Z
 -Wave (or Zigbee/Matter) controller
DTSTART:20251229T100000Z
DTEND:20251229T130000Z
DTSTAMP:20260406T113019Z
UID:f8abac85-c92a-501a-8d08-8a317ab6c685
CATEGORIES:
DESCRIPTION:We will be making own Z-Wave and Z-Wave Long Range devices Z-W
 ave Open Source SDK an Trident IoT SDK. It will also be possible to do Zig
 bee devices.\n\nWe will program a sensor and a switch using Z-Wave protoco
 l and include it in a Z-Wave network. Or Zigbee.\n\nWe will also browse th
 e Z-Wave Open Source project\, and how existing Trident IoT and SiLabs cod
 e differ from them.\n\nWe will also install Linux version of Z-Way - Z-Wav
 e/Zigbee/Matter Smart Home Controller. You will learn basics of Z-Wave and
  Z-Wave Long Range\, how to include devices and set up security schemes.\n
 \nWe will also master using Z-Way smart home controller\, investigate it's
  API and create own Linux or ESP32-based Z-Wave or Zigbee controller. We w
 ill also discuss Z-Wave/Zigbee-to-Matter bridging.\n\nYou will need a lapt
 op (Linux\, Mac or Windows) with SSH client\, USB A\, Google Chrome and in
 ternet access. Optionally you can use VS Code (install Trident IoT extensi
 on).\n\nBring your Z-Wave devices with you! If you have Home Assistant Con
 nect ZWA-2\, take it too!\n\nPresentation: https://docs.google.com/present
 ation/d/1EJFr8toheFOOE_k4l23wkLd98NE8yb8UbnnkNd2UKqU
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/making-own-z-wave
 -or-zigbee-device-from-scrat_ei4t
END:VEVENT
BEGIN:VEVENT
SUMMARY:(Outdoor) Ballooning with antennas
DTSTART:20251229T120000Z
DTEND:20251229T121500Z
DTSTAMP:20260406T113019Z
UID:c71f3598-99ad-5960-9a73-bc9a5767b3ba
CATEGORIES:
DESCRIPTION:Humans are ugly bags of mostly water and they and their infras
 tructure attenuate the RF signals we need for communication.\nWe'll explor
 e concepts that are possible due to miniaturisation of RF devices and thei
 r constraints. In the end we'll raise a tethered balloon with Meshcore and
  a Reticulum node indoors or - depending on the situation - outdoors and p
 layfully check the range we can achieve.\n\nWe'll discuss\n- what we tryin
 g to achieve / the problem at hand\n- the physical\, electrical and financ
 ial constraints of our solution compared to other approaches\n- what chang
 ed\, why can we do this in 2025 but not in 2015?  \n\nIn the end we'll rai
 se a tethered balloon with Meshcore and a Reticulum nodes indoors or - dep
 ending on the situation - outdoors and playfully check the height and rang
 e we can achieve.\n\nThis is a fun workshop that wants to encourage people
  to play with compact yet easily deployable communication infrastructure\,
  there will be some basic maths and diagrams\, but nothing intimidating.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/indoor-ballooning
 -with-antennas
END:VEVENT
BEGIN:VEVENT
SUMMARY:State of the Decentralization in Industry
DTSTART:20251229T121500Z
DTEND:20251229T123000Z
DTSTAMP:20260406T113019Z
UID:bd88d0ec-2127-5185-a1b4-13302ca49bd5
CATEGORIES:
DESCRIPTION:Open-source is fun and exciting\, but it often gets relegated 
 to 'hobby'\, but there are industry applications. Come learn about various
  businesses that use open-source libraries every day\, and how you can tur
 n your open-source contributions into work\, lifestyle\, or even changing 
 the world.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/state-of-the-dece
 ntralization-in-industry
END:VEVENT
BEGIN:VEVENT
SUMMARY:The CDC Badge: conference badge & devboard with TROPIC01 and ESP32
 -S3
DTSTART:20251229T123000Z
DTEND:20251229T130000Z
DTSTAMP:20260406T113019Z
UID:365c9a9d-7945-5e73-a717-7bf817d19f91
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/the-cdc-badge-con
 ference-badge-devboard-with-_420t
END:VEVENT
BEGIN:VEVENT
SUMMARY:Talk with Industry Cryptographers and Developers
DTSTART:20251229T130000Z
DTEND:20251229T140000Z
DTSTAMP:20260406T113019Z
UID:f29c72cb-f210-5300-b22b-ee74f0146343
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/talk-with-industr
 y-cryptographers-and-developers
END:VEVENT
BEGIN:VEVENT
SUMMARY:Programming with the TROPIC01 open architecture secure element
DTSTART:20251229T130000Z
DTEND:20251229T150000Z
DTSTAMP:20260406T113019Z
UID:b422d681-41d5-5dfe-a4b0-1a8dc6c7900d
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/programming-the-t
 ropic01-open-source-secure-e_1f9x
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leveraging LLMs for Preventing De-anonymization: Occlumask
DTSTART:20251229T140000Z
DTEND:20251229T143000Z
DTSTAMP:20260406T113019Z
UID:0f2775c2-d776-5dc0-89e1-5b128daf79c5
CATEGORIES:
DESCRIPTION:Have you ever mentioned the weather? Maybe offhandedly complai
 ned about mosquitoes? Then you may have inadvertently given away crucial b
 its of who you are and where you are.\nOcclumask is a new tool for detecti
 ng content-based anonymity leaks like this\, utilizing the capabilities of
  large language models to provide more accurate 'coverage'. Come and learn
  about the reasoning behind Occlumask's development\, and the various cons
 iderations that had to be made during its development.\n\nTopics covered i
 n this talk:\n\n* How does this work fill a gap in the broader anonymity t
 ool context of Tor\, stylometry\, etc?\n* Background of content-based data
 -leak prevention tools.\n* What is Occlumask and how does it work?\n* Why 
 use an LLM for this?\n* Unique challenges faced by using an LLM.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/leveraging-llms-f
 or-preventing-de-anonymization-oc
END:VEVENT
BEGIN:VEVENT
SUMMARY:Occlumask Demo & Brainstorming Session
DTSTART:20251229T143000Z
DTEND:20251229T163000Z
DTSTAMP:20260406T113019Z
UID:f06b2b45-89d1-5fc8-b7d4-d6d466e57a2f
CATEGORIES:
DESCRIPTION:Occlumask still has a long development ahead of it\, and we wa
 nt Occlumask to be as comprehensive as possible when it comes to detecting
  potential content-based data-leaks. In this workshop\, we will be demoing
  a prototype of Occlumask for you to try. Alongside this\, we will be aski
 ng how you would likely be using Occlumask\, and what you think Occlumask 
 should do for you.\n\nCome if you have ideas on:\n* What information do yo
 u consider important/sensitive?\n* What kinds of situations should Occluma
 sk be able to handle?
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/occlumask-demo-br
 ainstorming-session
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mesh Radio Workshop
DTSTART:20251229T150000Z
DTEND:20251229T170000Z
DTSTAMP:20260406T113019Z
UID:53698116-5bb3-53c0-861c-8c5168fa8143
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/mesh-radio-worksh
 op_gx3d
END:VEVENT
BEGIN:VEVENT
SUMMARY:SocksTrace: Preventing Proxy Leaks in Your Applications
DTSTART:20251229T163000Z
DTEND:20251229T170000Z
DTSTAMP:20260406T113019Z
UID:11e2394c-c225-537f-8d1a-2de3dd6872b4
CATEGORIES:
DESCRIPTION:SocksTrace is a Linux-based proxy leak detector and traffic pr
 oxifier built on seccomp-notify. By intercepting network syscalls directly
  in the kernel\, it provides runtime-agnostic visibility and enforcement t
 hat works even for statically linked binaries and modern browsers.\n\nThe 
 talk showcases real WebRTC-related proxy leaks discovered using SocksTrace
 \, explains shortcomings of traditional tools\, and demonstrates transpare
 nt SOCKSification\, DNS enforcement\, and safe handling of applications th
 at launch their own Tor instances. We conclude with practical use cases an
 d future directions for syscall-level network containment.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/sockstrace-preven
 ting-proxy-leaks-in-your-applicat
END:VEVENT
BEGIN:VEVENT
SUMMARY:qaul - Decentralized Off-the-Grid Mesh Communication App
DTSTART:20251229T170000Z
DTEND:20251229T173000Z
DTSTAMP:20260406T113019Z
UID:86448483-e0f0-5719-8453-86d03d99e5d8
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/qaul-decentralize
 d-off-the-grid-mesh-communication
END:VEVENT
BEGIN:VEVENT
SUMMARY:A hands-on guide for people who want to install and use Sockstrace
 .
DTSTART:20251229T170000Z
DTEND:20251229T190000Z
DTSTAMP:20260406T113019Z
UID:d9dd599b-cefb-598f-b29c-39bd2cad82a0
CATEGORIES:
DESCRIPTION:Workshop Plan:\n- Setup & Installation\n- Basic Usage (Detecti
 ng Leaks)\n- Advanced Configuration (Whitelist/Blacklist)\n- Q&A and Debug
 ging (Troubleshooting common setup)
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/a-hands-on-guide-
 for-people-who-want-to-install-an
END:VEVENT
BEGIN:VEVENT
SUMMARY:Decentralized Syndication — The Missing Internet Protocol
DTSTART:20251229T173000Z
DTEND:20251229T180000Z
DTSTAMP:20260406T113019Z
UID:5aff7e34-29b3-5f04-84a0-326e3c7ac072
CATEGORIES:
DESCRIPTION:I have implemented a conceptual decentralized content sydicati
 on platform and would like to tell more about the philosophy behind it.\n\
 nThe workshop will consist of two parts: 30 min presentation about the con
 cept and 30 min workshop where participants would try to publish their soc
 ial post on RSDS network.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/decentralized-syn
 dication-the-missing-internet-pro
END:VEVENT
BEGIN:VEVENT
SUMMARY:A Brief History of Keeping Secrets
DTSTART:20251229T180000Z
DTEND:20251229T183000Z
DTSTAMP:20260406T113019Z
UID:e860e296-72da-532c-a4a0-bee85f11ac57
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/a-brief-history-o
 f-keeping-secrets
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pre-Quantum to Post-Quantum Cryptography
DTSTART:20251229T183000Z
DTEND:20251229T193000Z
DTSTAMP:20260406T113019Z
UID:85bf2c41-0285-5cb5-b111-91d44cc226bf
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/pre-quantum-to-po
 st-quantum-cryptography
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zerocat Chipflasher
DTSTART:20251229T190000Z
DTEND:20251229T210000Z
DTSTAMP:20260406T113019Z
UID:f4e2a697-9f71-557f-9950-42f6e4142706
CATEGORIES:
DESCRIPTION:The Zerocat Chipflasher is a versatile device that is made for
  firmware replacement. Its operation requires some training and some knowl
 edge about typical difficulties in in-system flash programming.\n\nThis de
 vice comes with freedom in mind\, down to details. It started as a cellar-
 project during the time of Snowden revelations\, and now reaches a point o
 f maturity in cooperation with the GNU Boot project. Key features that mak
 e this device a reproducable tool on GNU/Linux-Libre systems\, now and in 
 future\, will be explained.\n\nYou will be trained in device operation\, t
 argeting a hard-to-flash ThinkPad T60 systemboard. Successful operation sh
 ould result in a successful boot of the liberated T60 laptop - but let’s
  see!\n-- https://www.zerocat.org
LOCATION:CDC Circle
URL:https://events.ccc.de/congress/2025/hub/event/detail/zerocat-chipflash
 er
END:VEVENT
BEGIN:VEVENT
SUMMARY:be-BOP: Ethical Commerce\, Without the Middlemen
DTSTART:20251229T193000Z
DTEND:20251229T200000Z
DTSTAMP:20260406T113019Z
UID:25e63a18-890b-5187-a751-5000c8ba7efc
CATEGORIES:
DESCRIPTION:**be-BOP is free and open-source software for sovereign commer
 ce.**\n\nIt’s built on a simple belief: merchants and communities should
  own the tools they depend on. We design technology that respects privacy\
 , rejects dark patterns\, and removes the need for accounts or intermediar
 ies. Our vision is trade without platforms\, data brokers\, or gatekeepers
  — commerce as a public good\, not a private empire.\n\nUnlike fragmente
 d “self-commerce” tools\, **be-BOP is a complete\, batteries-included 
 stack**. It supports e-commerce\, point-of-sale\, restaurant systems\, tic
 keting\, peer-funding\, and subscriptions — all self-hosted\, interopera
 ble\, and designed for real-world merchants. It aims for the reliability o
 f a platform\, without the capture of one.\n\nAdoption grows from the edge
 s: merchants and cooperatives seeking independence\, and creators tired of
  surrendering revenue to platforms. In **Goma**\, communities use be-BOP t
 o organize resources and stabilize local economies under pressure. Elsewhe
 re\, artists use it to sustain open culture without permission or lock-in.
 \n\nThe roadmap pushes beyond software. **Multitenant be-BOP** will enable
  domain-specific ecosystems — tailor-made for farmers’ markets\, repai
 r collectives\, or independent venues — while **cross be-BOP** will link
  autonomous nodes into a federation of mutual visibility. Together they an
 swer the twin failures of centralized commerce: loss of agency and isolati
 on.\n\nbe-BOP aspires to be more than a toolchain. It’s an experiment in
  rebuilding economic infrastructure on open terms — a foundation for **f
 ree\, federated\, and sustainable digital economies** that can’t be quie
 tly “enshittified.”
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/be-bop-ethical-co
 mmerce-without-the-middlemen
END:VEVENT
BEGIN:VEVENT
SUMMARY:Applying cryptoanarchy in individual and communal sovereignty
DTSTART:20251229T200000Z
DTEND:20251229T203000Z
DTSTAMP:20260406T113019Z
UID:4d3e036a-e73c-5246-aa7a-a62ee609db12
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/applying-cryptoan
 archy-in-individual-and-communal-
END:VEVENT
BEGIN:VEVENT
SUMMARY:On the Limits of Decentralization
DTSTART:20251229T203000Z
DTEND:20251229T220000Z
DTSTAMP:20260406T113019Z
UID:ceb2263a-55db-5f72-9d48-ccc2088a1c9d
CATEGORIES:
DESCRIPTION:In its iterative\, by now familiar format\, the workshop opens
  with a short framing by the facilitator\, introducing the inquiry and ref
 lecting on the asymmetry of facilitation itself and its relevance to decen
 tralization. Participants then break into smaller groups to explore the qu
 estions raised\, with room for divergence\, contestation and parallel line
 s of inquiry. The format remains intentionally open to shifts in attention
 \, authority and coordination as the session unfolds. We reconvene toward 
 the end to share reflections\, tensions and unresolved questions rather th
 an to converge on a single conclusion. The workshop invites participants t
 o engage not only with ideas of decentralization but with how those ideas 
 are enacted\, sustained or resisted in practice.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/on-the-limits-of-
 decentralization
END:VEVENT
BEGIN:VEVENT
SUMMARY:Welcome to the last CDC day
DTSTART:20251230T092500Z
DTEND:20251230T093000Z
DTSTAMP:20260406T113019Z
UID:8122fb96-8f4c-5a24-8d79-361e2ec1c83a
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/recap-and-precap-
 of-critical-decentralization_x3sg
END:VEVENT
BEGIN:VEVENT
SUMMARY:NextGraph Demo: Local First\, E2EE\, RDF graph DB\, and a Reactive
  ORM SDK
DTSTART:20251230T093000Z
DTEND:20251230T094500Z
DTSTAMP:20260406T113019Z
UID:7eb651d6-d6c2-5c72-be0c-6fd8caf919c6
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/nextgraph-demo-lo
 cal-first-e2ee-rdf-graph-db-and-a
END:VEVENT
BEGIN:VEVENT
SUMMARY:SeedSigner DIY Bitcoin signing device build workshop
DTSTART:20251230T094500Z
DTEND:20251230T114500Z
DTSTAMP:20260406T113019Z
UID:c7c95f2a-039e-51d9-94f4-0212b6513fed
CATEGORIES:
DESCRIPTION:Seedsigners are open-source DIY signing devices which can be b
 uilt using "normal" hardware like a Raspberry Pi and act as kind of hardwa
 re wallets to sign Bitcoin transactions. Since the hardware is missing a s
 ecure element chip\, the keys are saved externally\, usually via self-draw
 n QR-codes which are read again for every use via the build-in camera.\n\n
 We brought a few kits with us which we sell for 45€ and build together. 
 We will lashing the firmware on the MicroSD card and then build everything
  together in the 3d-printed enclosure.\n\nThe kit includes:\nRaspberry Pi 
 Zero 1.3 (without Wifi or Bluetooth chip)\, GPIO-header already soldered\n
 Display-Hat with joystick and buttons\nCamera\n64GB MicroSD card\nMicroUSB
  to USB-C cable\n3D printed enclosure\n6 printed templates for self-drawn 
 QR-Codes
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/seedsigner-diy-bi
 tcoin-signing-device-build-w_312i
END:VEVENT
BEGIN:VEVENT
SUMMARY:Whats new in Reticulum
DTSTART:20251230T120000Z
DTEND:20251230T123000Z
DTSTAMP:20260406T113019Z
UID:bdbd06d2-4e69-5bbe-9c6c-25bfd9982eaf
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/whats-new-in-reti
 culum
END:VEVENT
BEGIN:VEVENT
SUMMARY:Solidarity Finance on P2P Rails
DTSTART:20251230T123000Z
DTEND:20251230T130000Z
DTSTAMP:20260406T113019Z
UID:edeb9f7b-30b5-5ed0-abf4-018af1ca6390
CATEGORIES:
DESCRIPTION:This talk will last approximately 15 to 20 minutes followed by
  Q&A discussion for the rest of the time.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/solidarity-financ
 e-on-p2p-rails
END:VEVENT
BEGIN:VEVENT
SUMMARY:Who's afraid of anonymity? A philosophical and political toolkit
DTSTART:20251230T130000Z
DTEND:20251230T133000Z
DTSTAMP:20260406T113019Z
UID:5476150a-512d-564c-b2e3-527e5466d292
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/whos-afraid-of-an
 onymity-a-philosophical-and-polit
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mutual Vend - decentralized coop vending machine
DTSTART:20251230T133000Z
DTEND:20251230T140000Z
DTSTAMP:20260406T113019Z
UID:ecaad706-f537-512b-8d73-f6a38b3afde6
CATEGORIES:
DESCRIPTION:Come learn about how digital ledgers and peer to peer vending 
 machines challenge existing labor rights\, profit margins \, and finance l
 egalities!
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/mutual-vend-decen
 tralized-coop-vending-machine
END:VEVENT
BEGIN:VEVENT
SUMMARY:Building the next web
DTSTART:20251230T140000Z
DTEND:20251230T143000Z
DTSTAMP:20260406T113019Z
UID:04907bec-c5fd-5ad9-b920-1e8ea83ba051
CATEGORIES:
DESCRIPTION:Let’s figure out - what are the ingredients of the web evolu
 tion we all actually want? First - we look into the evolution we’ve had 
 until now - in Decentralized communication\, AI\, XR\, Bitcoin\, & other f
 orefront technologies that shape the internet as we know it. Then - we bra
 instorm - What are potential outcomes of our best & worst decisions there?
  They will shape how we build the next web.
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/building-the-next
 -web
END:VEVENT
BEGIN:VEVENT
SUMMARY:Offworld Voyage @ 39c3: Astronaut Collectives Are Beautiful (A pro
 gress report)
DTSTART:20251230T143000Z
DTEND:20251230T150000Z
DTSTAMP:20260406T113019Z
UID:7eaee098-7ef3-530e-b2c2-9c30f6a9eeb2
CATEGORIES:
DESCRIPTION:
LOCATION:CDC Triangle
URL:https://events.ccc.de/congress/2025/hub/event/detail/offworld-voyage-3
 9c3-astronaut-collectives-are-bea
END:VEVENT
END:VCALENDAR