The Critical Decentralisation Cluster (CDC) is a group of likeminded assemblies working together to present projects, talks and workshops that critically discuss the future of decentralisation. You can visit us during Dec 27-30 2025 in Hamburg (Germany) at the 39th Chaos Communication Congress.

The CDC usually takes shape as an area in Hall H with:

• tables and seats for ca. 120 people
• 2 info tables and meeting spots
• 2 workshop areas with public schedule
• 1 recording area

Talks and workshops submissions are now open at pretalx.riat.at.

We welcome proposals from our assemblies and any other project fitting the cluster themes’ (decentralization, privacy & anonymity and open hardware).

assemblies

• RIAT - independent research institute in Vienna
• Monero Community
• Namecoin - decentralized tamper-resistant naming system + PKI
• Swiss Cryptoeconomics
• I2P - fully encrypted peer-to-peer overlay network
• Cyberraum - hackers’ group from Hamburg united in the quest to challenge the status quo
• Social Dist0rtion Protocol - ad-hoc riddles and games
• Firo - independent blockchain privacy and decentralization tech research
• FOSSASIA - open-source community in Asia
• Off-Grid Messaging - independent networks over LoRa and packet-radio

We welcome other assemblies in the categories Privacy & Anonymity, Enshittification, Cryptography, Open and Verifiable Hardware and Peer-to-Peer (P2P) networks and tools.

contacts

• Coordination and other talk at #cdc:dod.ngo community on Matrix.
  All rooms are bridged to hackint IRC server:
  • Main room bridged to #cdc-38c3
  • Coordination > #cdc-38c3-coordination
  • Tickets > #cdc-38c3-ticketbörse
  • Off-Grid Messaging > #38c3-off-grid-messaging
  • Watercooler (off-topic) > #cdc-38c3-watercooler
• Email: c3 at RIAT’s domain.

contributing

• Volunteer work is essential to keep the cluster going. Tasks range from “keeping our tables tidy” all the way to “operating the A/V setup”. All assemblies should be proactive.
• Financial support enables us to build the tools we need. From the high tech recording setup down to low tech items such as furniture. Monero donations are welcomed: 8B5xvYLwUWsiwzNhBeZJkABRgPsYqsR3X8mHVWgphRqQVvM5khLYdfvgyZg2Rhub2uFnoSiVVKTgNKpvDUDVho2BQVyzEDC