machine that was coming into widespread use. In late October or early November 1932, the head of the Cipher Bureau's German section, Captain Maksymilian Ciezki, tasked Rejewski to work alone on the German Enigma I machine for a couple of hours per day; Rejewski was not to tell his colleagues what he was doing.

Solving the wiring

To decrypt Enigma messages, three pieces of information were needed: (1) a general understanding of how Enigma functioned;

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