Criminal codes and ciphers

A friend of mine teaches a Network Security course at a local community college and he invited me to give a talk about criminal codes and ciphers. Here is the video of the talk: Topics include the Unabomber, BTK Killer,…

Hands on Z408

Tom Voigt managed to gain access to the evidence room (presumably at SFPD) to have a closer look one of the three parts of the original Z408 cipher: He says that inspecting the back of the paper reveals Zodiac used…