![]() The keyboard was for typing the unencrypted text (or receiving the encrypted text). However, a wider plugboard developed in 1939 increased this figure to 10. Each rotor was connected differently.Īt first, the Enigma machine could only change six letters before reaching the starting point. There were 26 contacts on each face of the rotor disc, and they were connected to 26 different contacts on the back. In 1938, there were five rotors in the machines. As the transcribed text was being typed, the encrypted text was being made automatically at the same time.Įach rotor contained 26 letters of the alphabet and was set to any starting position from A to Z (based on the daily key). The rotors with alphabet rings can be seen.īecause this part was not rotating, the encrypted text was automatically sent back onto the rotor discs. The parts of the Enigma machine The original Enigma machine was invented by Arthur Scherbius. Moreover, the system was almost unbreakable unless the daily key settings were captured. ![]() The machine produced the deciphered text by itself. To create the encrypted text, the unencrypted text was written by the machine, then the encrypted text was formed and transmitted by radio, and the recipient simply wrote the coded message. The beauty of the mechanical encryption system of Enigma machines was that it was very fast and, more importantly, eliminated human error. The Germans eventually obtained approximately 30,000 Enigma machines with slightly more complex designs than were commercially available.ĭuring World War II, the Wehrmacht, Luftwaffe, and German Navy developed individual daily key lists. When the official British history of the First World War revealed that German messages were deciphered, in 1923 the German army realized that a more secure encryption system was required. The steps by which the Enigma machine was cracked
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