thumb|31C3 in Hamburg
thumb|The 22C3 in December 2005
The Chaos Communication Congress is an annual conference organized by the Chaos Computer Club.
The congress features a variety of lectures and workshops on technical and political issues related to security, cryptography, privacy and online freedom of speech.
The event has taken place regularly at the end of the year since 1984, with the 2021 date and duration (27–30 December) established in 2005.
It is considered one of the largest events of this kind, alongside the DEF CON in Las Vegas.
History
The congress is held in Germany.
It started in 1984 in Hamburg, moved to Berlin in 1998, and back to Hamburg in 2012, having exceeded the capacity of the Berlin venue with more than  attendees.
Since then, the congress continues to attract an increasing number of people: around  attendees in 2012, over  in 2015 and more than  in 2017.
Since 2017 the congress takes place at the Trade Fair Grounds in Leipzig, since the Hamburg venue was closed for renovation in 2017 and the existing space was not enough for the growing congress.
A large range of speakers are part of the scene.
Organizational work is done by volunteers called Chaos Angels.
The non-members entry fee for four days was €100 in 2016, which was raised to €120 in 2018 to include a public transport ticket for the Leipzig area.
An important part of the congress are the assemblies, semi-open spaces with clusters of tables and internet connections for groups and individuals to collaborate and socialize in projects, workshops and hands-on talks.
These assembly spaces, introduced at the 2012 meeting, combine the hack center project space and distributed group spaces of former years.Assemblies at 29C3
From 1997 to 2004 the congress also hosted the annual German Lockpicking Championships.
2005 was the first year the Congress lasted four days instead of three and lacked the German Lockpicking Championships.
2020 was the first year in which Congress did not take place at a physical location due to the COVID-19 pandemic, giving way to the first Remote Chaos Experience (rC3).
Congresses from 1984 to today
Gallery
2013-12-30 30C3 2840.JPG|Glenn Greenwald gives his Keynote at 30C3 2013-12-30 30C3 3432.JPG|„Seidenstraße” (Silk Road), a Pneumatic tube system introduced at 30C3 2013-12-30 30C3 3455.JPG|Assemblies and the Pneumatic tube system at 30C3 2013-12-29 30C3 - Sarah Harrison 3268.JPG|Sarah Harrison appears with Julian Assange for an appeal at 30C3 2017-12-28 Leipzig, 34c3, Fairy Dust (freddy2001) - denoised and pixelized.jpg|Main hall of the Leipzig Trade Fair during 34C3 Leipziger Messe Night - 35c3.jpg|The Leipzig Trade Fair seen from the west during the 35C3 See also
Chaos Communication Camp
SIGINT
DEF CON
Notes
References
External links
Overview of Chaos Communication Congresses
Blog for the Chaos Communication Congress (and other events)
