History of Cryptography and Cryptanalysis by John F. Dooley

Author:John F. Dooley
Language: eng
Format: epub
ISBN: 9783319904436
Publisher: Springer International Publishing

Either two or three operators would be required to send or receive messages using an Enigma. Three operators were required because the Enigma doesn’t print; all the output letters are displayed via lamps. So one operator would read the plaintext, the second would type and call out the cipher letter, and the third would write down the ciphertext that was then transmitted via Morse code.

Using the Enigma required that the machine be set up for each message using two keys, the day key , and the message key . The day key had five parts1.the positions of the rotors (Welzgelage)

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