Excellent. Very interesting at least to me.
The German military used the Enigma cipher machine during WW2 to keep their communications secret. The machine was available commercially during the 1920s, but the military potential of the device was quickly realised and the German army, navy and air force all used a more developed model of the machine to encipher their messages believing that it would make these communications impenetrable to the enemy.
The Enigma machine is an electro-mechanical device that relies on a series of rotating ‘wheels’ or ‘rotors’ to scramble plain text messages into incoherent cipher text. The machine’s variable elements can be set in many billions of combinations, and each one will generate a completely different cipher text message.
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