MAKE A MEME View Large Image AD-cycle.png AD-cycle svg A 4-cycle formed from the first and fourth letters of four Enigma message indicators as used before 1938 by the German military Matt Crypto 14 21 13 December 2005 UTC Cryptography diagrams
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Keywords: AD-cycle.png AD-cycle svg A 4-cycle formed from the first and fourth letters of four Enigma message indicators as used before 1938 by the German military Matt Crypto 14 21 13 December 2005 UTC Cryptography diagrams
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