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 ...
In choosing a basic set-up for the machine, there was a choice from the 60 possible wheel orders, the 17,576 ring-settings for each wheel order, and over 150 million million stecker-pairings (allowing ...
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