An overview of Al-Qaeda's use of encryption technology in their terrorist activities. Relevant to the debate about distributing powerful cryptography to everyone, including those with bad intentions.

The SIGSALY voice encryption system used during WWII by the Allies.

Speed is generally considered exciting, but this blog post takes a different approach. It uses interesting examples, both foreign and familiar, to create a relative scale of speed. It is extremely easy to understand and informative. 

An article about a Cisco security upgrade for the cloud and various devices that access the cloud.

An in-depth description of Julius Caesar's shift cipher and how it works. Also shows how to use frequency analysis and chi-square values to quickly break the cipher.