DEF CON (also written as DEFCON or Defcon) is the world's largest annual hacker convention, held every year in Las Vegas, Nevada. The first DEF CON took place in June 1993, and in 2008, over 8500 people attended DEF CON 16.

Many of the attendees at DEF CON include computer security professionals, journalists, lawyers, federal government employees, crackers, and hackers with a general interest in computer code and computer architecture. The event consists of several tracks of speakers about computer- and hacking-related subjects, as well as social events and contests in everything from creating the longest Wi-Fi connection and cracking computer systems to who can most effectively cool a beer in the Nevada heat. Other contests include lockpicking, robotic-related contests, art, slogan, coffee wars, and Capture the Flag. Capture the Flag (CTF) is perhaps the best known of these contests. It is a hacking competition where teams of hackers attempt to attack and defend computers and networks. CTF has been emulated at other hacking conferences as well as in academic and military contexts.

http://defcon.org


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