TL;DR

• 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 …

TL;DR

• 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 …

TL;DR

• 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 …

The word’s on the street that you can now stock up on amazing cloth in the official 39C3 look at our merch store.

In addition to the traditional black, this year’s shirts, zippers, hoodies, and sweatshirts are also available in spring-like shades of misty jade, lavender, and natural raw, in joyful anticipation of future camps. And to top it all off, you can adorn your heads with 39C3-themed embroidered beanies and your kids’ necks with uber-nerdy bibs. And for those who want to shine with subtle hacker shibboleth textiles even in formal settings, there is a lovingly …

After the halfnarp is before the schedule. Thanks to you, and thanks to the many helping hands of the content teams, we can now present to you the first version of the 39C3 Fahrplan!

The official stage programme at the 39th Chaos Communication Congress starts on 27 December, 10:30 with the opening ceremony and shines with a total of 165 talks. These have been lovingly sorted and curated for you into seven topical tracks. There is definitely something for everyone!

To those of you who now have counted manually or even found the gaps in the schedule: That’s right, because we have a few surprise …

Hinweise für Mithelfende und Veranstalter am Ende des Textes!

Junghacker:innen-Tag - sei dabei!

Zu unserer Freude haben sich in den letzten Jahren immer mehr Junghacker:innen auf dem Congress eingefunden. Daher bieten wir auch diesmal, wie schon in den Vorjahren, einen speziell auf Kinder und Jugendliche zugeschnittenen Junghacker:innentag an. Am zweiten Congresstag, dem 28. Dezember 2025, organisieren Freiwillige aus vielen Assemblies von etwa 10 bis 17 Uhr ein vielseitiges Workshop-Programm für angehende Hacker:innen.

Wer schon immer mal löten, programmieren, einen 3D-Drucker ausprobieren, …

TL;DR

What has changed, in short: In response to the very clear reactions to the exception, the project “Creature ChroniCles” will now be governed by the photo policy in its familiar form. Before every photo, everyone involved will be asked for their consent.

Creature ChroniCles reloaded

In the pre-Congress stress, some things and details unfortunately get lost that seem natural for the people involved, while for others they are far from clear and unambiguous. That did happen to us with the blog article on the “Creature ChroniCles” project. We were too much trapped in our inside view. Most of …

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 …