Here's How the Enigma Machine Works

Here's How the Enigma Machine Works
AP Photo/Kin Cheung

The Enigma machine, first patented in 1919, was after various improvements adopted by the German Navy in 1926, the Army in 1928, and the Air Force in 1935. It was also used by the Abwehr, the Sicherheitsdienst, the railways, and other government departments. From then until 1939, and indeed throughout the war, successive refinements were introduced, varying from service to service, and there were detailed changes in operating procedure until 1945. The following short description can therefore summarize only its main features and mention only a few of the Enigma variations.

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