TL;DR

• 7.2.2026 im Lokomov (Augustusburger Straße 102, Chemnitz)
• Vorträge, Lightning Talks, Workshops (tbd.) und Abendunterhaltung
• chch.it/Winterchaos; CfP inzwischen geschlossen

Am 7. Februar laden wir euch nach Chemnitz zum gemütlichen Winterchaos ein. Zwischen Retro-Computern, Waffeln und USB-C-Schnittstellen treffen wir uns im Lokomov in der Augustusburger Straße 102 zu einem Nachmittag und Abend mit Vorträgen, Lightning Talks und etwas Abendunterhaltung. Bei Gelegenheit könnt ihr außerdem unseren Hackspace besuchen.

Anmeldung:

Die Teilnahme ist kostenlos, aber eine Anmeldung unter …

39C3 is over. Sadly. We hope that your journey home went well and that you had a good return to reality.

Those four days of living a utopia were far too short. There was so much more that one could have experienced, so many more things to discover, so many more people to meet, so many more talks to see … To our own regret, the length of the event can’t really be changed. But many other things can be! That is why we want to ask for your feedback. Let us know what you liked, but also what you didn’t like. We appreciate both praise and constructive suggestions for improvement! But you need to be …

Dear creatures and participants,

the end is nigh! Days full of encounters, curiosity, tin solder, discourse, music, code and Chaos are behind us. Thank you for filling this Congress with life. You made this event into what it is.

As much as we would wish Congress to continue forever, now the time has come to pack up, take a breath and say goodbye.

After the closing, assemblies start emptying their spaces. Please take the time to tear down in an orderly and mindful way. Clear your tables quickly so that the Møbelhaus can carry tables and chairs away and that network and power infrastructure can …

Do you like pagers? Are you interested in how to design a critical infrastructure or would you like to get to know such systems at 39C3? Looking for an easy way to get started in the world of amateur radio?

We at assembly Signalspielplatz, in cooperation with CERT and the radio group DL0TUH, are developing and operating a pager infrastructure that is to be used for alerting CERT operatives in the future. To test this infrastructure, we would appreciate it if you could send us lots of test messages!

Receive Messages

We operate our system on 439.9875MHz. We provide the following RICS for you: …

TL;DR

• 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 …

Once again this year, hackspaces and other locations are offering a place to meet, stream Congress talks, hack, have a party and more. Congress is everywhere where people bring it to life. It’s also possible to visit one another.

These Congress Everywhere locations are known to us:

Good news: Once again we were able to convince some nearby schools to let us use their gymnasiums as sleeping spaces. Tickets will cost 5 € per night. They will be sold at the cashdesk from day 0 until day 4, starting at 18:00. Each evening, tickets will be sold for the current night only.

We have reserved a special allocation for angels who have worked some shifts. Gymnasium tickets for angels will be available at Heaven at all times and for more than just the current day.

Showers and toilets will be available on site, you need to bring your own camping mat and sleeping bag.

Please note: …

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 …