I have re-encoded all of the DEF CON 22 videos with h.265, significantly reducing the file size while keeping the same quality.

All the old torrents are no longer seeded.
PLEASE download and seed the newer, smaller ones:

Slides https://media.defcon.org/DEF%20CON%2...slides.torrent
Video and Slides https://media.defcon.org/DEF%20CON%2...slides.torrent
Video https://media.defcon.org/DEF%20CON%2...0video.torrent
WiFi Village talks https://media.defcon.org/DEF%20CON%2...0talks.torrent
Film Contest https://media.defcon.org/DEF%20CON%2...ontest.torrent