DEF CON 12 Hacking Conference By Jon Callas - Message Security - Video
Jon Callas | The Revolution Will Be Encrypted
DEF CON 12 Hacking Conference By Jon Callas - Message Security backup - Video
Security Weekly #414 - Interview with Jon Callas
DEF CON 10 Hacking Conference Presentation By Nicholas Fischbach - Router Security and Forensics - Video
Shmoocon 2007 Three Crypto Geeks on the Current State of Cryptography and the Internet Rodney Thayer, Jon Callas and Ben Laurie
DEF CON 11 - Phil Zimmerman - A Conversation with Phil Zimmermann
#HITB2012KUL D1T1 - P. Langlois & E. Gadaix - Why Telcos Keep Getting Hacked
