On Level 1 of the 39th Chaos Communication Congress, behind the Phone Operation Center, visitors encounter two works that quietly yet insistently embed themselves in the discourse of the event: Downwards – Sprint 101 and Downwards – Sprint 102. Both works were created specifically for the 39C3 and are being shown publicly for the first time. They interpret this year’s motto Power Cycles—technically as well as socially—through a precise, material-based visual language.

Materialized Burndowns

Both works are conceived as relief-like collages on a dark ground. A sloping mass of shredded paper …

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• Registration is open – register your number in Guru3
• Don’t forget your phone (ISDN, DECT, GSM, SIP)
• Remember batteries, charging cables, and CCC SIM card
• There will be eSIMs for the GSM network
• The dial-in number from outside is: +49 40 5730830 xxxx

Preparations for 39C3 are already in full swing. You have already registered more than 5,600 extensions. We are very excited. We would like to take this opportunity to provide some information about telephony at 39C3 and have compiled the following details on all the technologies you can use to participate in the Congress telephone …

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• There will be two lightning talk sessions
• You can submitt your talk here: https://cfp.cccv.de/39c3-lightningtalks/cfp
• Dedicated block for talks related to sustainability
• 5 minutes for a talk
• Submissions only with slides
• First come, first served! (The exception proves the rule.)

Your chance is here!

Have you always wanted to stand in front of a large audience and bring your knowledge, incredible experience, projects, ideas, hacks, or stories to the stage? Now is your chance! The Lightning Talks at 39C3 open the floodgates for you.

Here are the rules:

• You have 5 minutes for your …

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• Various support structures are available for you at 39C3.
• Awareness: e.g. in cases of discrimination, boundary violations, harassment and (sexualised) violence.
• c3auti: Needs and problems of neurodivergent beings
• Accessibility: easy access and minor support issues on site.
• Contact details can be found in the text below and at help.ccc.de.
• In addition, CERT is available for medical care, CrewCrew for security issues and the arbitration board for serious conflicts.
• Please read the principles.

All Creatures Welcome

“What brings us together is not what we already know, but what we still …

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• Workshops, group meetings, short talks, … – Our collective term for all of these is Self-organized Sessions.
• You can create Self-organized Sessions already, but dedicated rooms will become bookable gradually this time. The start date for each round has now been determined, see below!
• An overview of all Self-organized Sessions can be found in the Hub.
• If you are interested in a session, log in and mark it as a favourite – this helps us estimate how large the room needs to be.
• To create new sessions yourself, use the Hub’s Backoffice.
• Assemblies can decide whether they want to open their …

Planning for Congress, unsure what to do there, interested in applying your impressive language skills? If you are multilingual and fluent in German, English and maybe other languages, please consider joining the interpreters team, c3lingo.

We interpret ALL talks in the four main halls live and in real-time. German talks are interpreted into English, and vice versa. Our work is streamed to the Internet and transmitted as audio-only streams in the halls, and recordings are published on media.ccc.de. We have another channel where we interpret into more languages, this is transmitted and …

Once again this year, the Chaos Mentors are joining the Chaos Communication Congress in Hamburg!

Interested mentors and mentees can register on our Chaos Mentors platform until 25 November 2025, 23:59 UTC+1.

We’re excited to meet lots of new people who want to experience the colorful, fascinating chaos for the first time, maybe that includes you!

If you’re looking for a bit of support or a small group to connect with during your first Congress, you’ve come to the right place.

Who are the Chaos Mentors for?

Are you curious about Congress but not sure if you’ll feel at home there? Maybe you have …

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• Registration is open - register your extension in Guru
• Don’t forget to bring your phone (DECT, GSM, SIP)
• Remember to bring Batteries, Chargers und CCC SIM-Card
• Our public dialin number: +49 40 5730830 xxxx

2024. The brave new world has completely transformed telephony. IP telephony has replaced conventional telephone technology, including ISDN and all its components. Until 2017, we drove a truck to the Chaos Communication Congress on December 21. We spent days hauling, packing, pulling cables, patching cables, configuring, maintaining main distribution plans and fixing errors so …

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• There will be two Lightning Talk sessions
• See https://cfp.cccv.de/38c3-lightningtalks/cfp for submission
• Further information at https://events.ccc.de/congress/2024/infos/lightning-talks.html

Lightning Talks?

Did you assume that the thrill of sharing your ideas in front of a huge audience at a C3 was something you’d never experience? Do you work on a cool project and want to get the word out? Was your talk one of the hundreds that got rejected? Did you come up with an awesome hack that you need to share? Go ahead and enter your Lightning Talk now!

The 38C3 Lightning Talks consist of two …

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• We categorize workshops, group meetings, short presentations, etc. as Self-organized Sessions.
• You can create self-organized sessions stubs now, but public room booking will only be possible from 17 December.
• An overview of all self-organized sessions can be found in the Hub.
• To register a self-organized session, use the Backoffice of the Hub.

The magic word is self-organization

You want to arrange a meeting of a group or a discussion about a specific topic? Give a workshop? Host a competition or a game? Organize something outside the building? Want to give a short talk or show a …

We have opened the 38C3 Public Wiki – which we generally call “Hub” by now. The hub is meant as the central place for getting information about content at Congress: It aggregates the events from the main stages (Fahrplan), community stages, assemblies, as well as self-organized sessions into one schedule which is then also used by the mobile apps.

You can view the registered and accepted assemblies in the Assembly list. Please note, the Assembly team has not yet processed all registrations and the list will fill up over the next few days.

If you miss your Assembly in the list, …

How will accessibility be at Congress? We have learned a lot last year. There are improvements.

What is new or different?

• An issue with accessibility of the Congress Centre has been resolved: all induction loops should now be operable.
• The Accessibility Helpdesk at Infodesk is a place to ask questions.
  • Hidden Disability Badges will also be available at the Helpdesk.
• Using a wheelchair on 37C3 was difficult. Here’s a list of fixed and remaining issues.
• QuietQube has moved one door to the left. Navigation links will be provided soon. The Silent Room will once again be hidden. You can ask for …