Def Con Online Directories 1,786
https://defcon.org
1.5s
Started in 1992 by the Dark Tangent, DEF CON is the world's longest-running and largest underground hacking conference. Hackers, corporate IT professionals, and three-letter government agencies all converge on Las Vegas every summer to absorb cutting edge hacking research from the most brilliant minds in the world and test their skills in contests of hacking might.
