Spy Diary


The WWII Enigma cypher was based on a system of three rotors that substituted cipher text letters for plain text letters. The innovation that made Enigma machine so powerful was the spinning of its rotors. As the plain text letter passed through the first rotor, the first rotor would rotate one position. The other two rotors would remain stationary until the first rotor had rotated 26 times. Then the second rotor would rotate one position. After the second rotor had rotated 26 times, the third rotor would rotate one position. As a result, an 's' could be encoded as a 'b' in the first part of the message, and then as an 'm' later in the same message.

Competition: TradeCraft


Competition: Surveillance


Competition: Protection


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