Offical URL: http://defcon.org/

Binjitsu by ddtek (... — 2012)
Legitimate Business Syndicate (2013 — ...)

CTF events

NameWeight
DEF CON CTF 201680.00
DEF CON CTF 201580.00
DEF CON CTF 201480.00
DEF CON CTF 201380.00
DEF CON CTF 201280.00
DEF CON CTF 201180.00