1. Introduction -- 2. From Julius Caesar to simple substitution -- 3. Polyalphabetic systems -- 4. Jigsaw ciphers -- 5. Two-letter ciphers -- 6. Codes -- 7. Ciphers for spies -- 8. Producing random ...
Machine Enigma and its coding system were designed and patented for both civil and military service by a German engineer Arthur Scherbius in February 1918. It was a cipher machine based on rotating ...
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