At Arlington Hall, women on the Venona Project exploited a Soviet cipher flaw to expose Cold War spies, a secret that remained hidden for decades.

The files include operating instructions for the SG-41, encryption rules and key tables used during the closing weeks of the war ...

Enigma cipher machines have endured in the minds of history buffs and cryptography hobbyists for more than a century, still discovered at dusty French flea markets and dredged up from under beach ...

Before you register, you might plan an ideal schedule and list of alternative classes. It’s helpful to have the 5-digit class numbers ready when your registration appointment time begins. Class ...