Between 1969 and 1974, the Zodiac sent multiple letters, four of which contained cryptograms. His first cipher, known as the "408 cipher," was quickly decoded by amateur codebreakers and revealed his ...

At close: March 28 at 4:00:01 PM EDT ...

To be concise, a cipher described in the above context refers to the field of cryptography. Cryptography as applied to the control system is the practice and technique for securing data communications ...

Canada’s Carney says old U.S.-Canada relationship is ‘over.’ ...