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25th Chaos Communication Congress
December 27th to 30th, 2008
Berlin, Germany


is the annual four-day conference organized by the Chaos Computer Club (CCC) in Berlin, Germany.First held in 1984, it since has established itself as "the European Hacker Conference" attracting a diverse audience of thousands of hackers, scientists, artists, and utopists from all around the world.

We want you to join and be a part of this unique event which serves as a public platform for cross-culture inspiration and borderless networking. 25C3 is fun!


The 25C3 conference program is roughly divided into six general categories. These categories serve as guidelines for your submissions (and later as a means of orientation for your prospective audience). However, it is not mandatory for your talk to exactly match the descriptions below. Anything that is interesting and/or funny will be taken into consideration.


The "Hacking" category addresses topics dealing with technology, concentrating on current research with high technical merit. Traditionally, the majority of all lectures at 25C3 revolve around hacking.

Topics in this domain include but are in no way limited to: programming, hardware hacking, cryptography, network and system security, security exploits, and creative use of technology.


The "Making" category is all about making and breaking things and the wonderful stuff you can build in your basement or garage. Most welcome are submissions dealing with the latest in electronics, 3D-fabbing, climate-change survival technology, robots and drones, steam machines, alternative transportation tools and guerilla-style knitting.


The "Science" category covers current or future objects of scientific research that have the potential to radically change our lives, be it basic research or projects conducted for the industry.

We are looking for talks and papers on the state of the art in this domain, covering subjects such as nano technology, quantum computing, high frequency physics, bio-technology, brain-computer interfaces, automated analysis of surveillance cctv, etc.


Technology development causes great changes in society and will determine our future. This category is for all talks on subjects like hacker tools and the law, surveillance practices, censorship, intellectual property and copyright issues, data retention, software patents, effects of technology on kids, and the impact of technology on society in general.


Shaping the world we live in means making it more interesting, entertaining and beautiful. The hacker culture has many facets ranging from electronic art objects, stand-up comedy, geek entertainment, video game and board game culture, music, 3D art to e-text literature and beyond. If you like to show your art and teach others how to make their lives more enjoyable, this category is for you.


In addition to individual speakers the Chaos Communication Congress is also inviting groups such as developer teams, projects and activists to present themselves and their topics.

Developer groups are also encouraged to ask for support to hold smaller on-site developer conferences and meetings in the course of the Congress.

Further Information

The Chaos Communication Congress is a non-profit oriented event and speakers are not paid. However, financial help on travel expenses and accommodation is possible. It needs to be agreed upon after acceptance of the submission, though. Don't be shy and state your requirements in the application when submitting your lecture and we'll work something out!

You can find the preliminary agenda and additional information on our 25C3 website at

For further information and questions please feel free to contact 25c3-content (at)


All proposals must be submitted online using our online lecture submission system at Please follow the instructions given there. If you have any questions regarding your submission, feel free to contact us at 25c3-content (at) but do NOT submit your lecture via e-mail.


25C3 is an international event and we want to have a lot of interesting talks in English for the benefit of our growing number of international guests. So ideally we are looking for speakers who can give lectures and/or workshops in either English or German. But while we are interested in maximizing the quality of presentations, the topic and its relevance to our community are our main concern. So don't worry about your English skills: the language of a submission is not a criteria for accepting or rejecting it!

If you feel insecure talking in English, have received criticism on your language skills from your audience before, or if you just fear that the value and understandability of your lecture might suffer, please offer your talk in German. Please tell us if you are a native speaker of English or have similar skills, when submitting your lecture.


Accepted speakers can optionally hand in a paper which will be published with an ISBN in the 25C3 Proceedings. Papers will be accepted in Portable Document Format (PDF) only and should be around 5 pages. The PDF file must not be password-protected or contain other restrictions. Paper size should be DIN A4 in portrait orientation. All margins must be set to at least 2 cm (0.78 inches). Pictures should be greyscale and up to 300dpi. Apart from that, you are free to use any layout you want.


Accepted speakers are asked to hand in slides used in their talks. Please use a well-known format for your slides.


Audio and video recordings of the lectures will be published online in various formats. The Chaos Communication Congress Proceedings are published on paper and online. Only reviewed and accepted talks and presentations will be published.

All material will be available under the Creative Commons "Attribution-NonCommercial-NoDerivs 2.0 Germany" (BY-NC-ND) license allowing free non-commercial redistribution of the material as long as the original credit to authors and publishers is retained.

Licence URI:

We encourage contributors to publish their work under a more liberal license; if you wish to do so, please state this with your submission.

Dates and Deadlines

The deadline for submission is October 5th, 2008 Midnight (23:59) UTC. Notification of acceptance will be sent by e-mail on November 7th, 2008 the latest. However, you may very well get your notification earlier than that if needed. Final papers or slides are due by November 18th, 2008.

  • October 5th, 2008 (Midnight UTC) Submission due
  • November 7th, 2008 (Midnight UTC) Final notification of acceptance (or earlier)
  • November 28th, 2008 (Midnight UTC) Final papers due
  • December 27th - 30th, 2008 Chaos Communication Congress

Lecture Requirements

Lectures should not exceed 45 minutes plus up to 10 minutes for questions and answers. Longer time slots are possible if we feel the topic demands it (please tell us if necessary). Workshops should include a talk on the basic principles in the lecture programm and a practical hands-on session in the workshop room.

Criteria which must be met to consider a lecture

  • submission is in time
  • for the event all fields in the general and the description tab are filled out
  • for the person all fields in the descripion tab are filled out

Criteria by which we assess a lecture

  • we consider the topic in general relevant for the participants
  • we consider the topic currently relevant for the participants
  • we consider the topic interesting, fun and worthy to be known more about
  • the lecture is about something the speaker made himself
  • we think the lecture might be fun
  • the lecture is part of a workshop (has a second part which is a workshop)
  • the lecture presents something new
  • the more information provided about the lecture and the speaker the better

Criteria by which we do NOT assess a lecture

  • the language
  • need for financial help on travel expenses

Archived page - Impressum/Datenschutz