As early as 1931, Gustave Bertrand of the French intelligence services received from the traitor Hans Thilo Schmidt documents concerning the Enigma cipher machine. This machine was intended to equip all the German military forces. This is the beginning of an epic that has probably changed the History. The main documents collected by Bertrand have not been destroyed and are available in the archives of the French Army (SHD). This article describes and analyzes each of these documents, including the evolution of the Enigma and its procedures related in these documents. In conclusion, the article lists the findings that come from reading these originals and first and foremost the impact of having a cipher message with its plaintext on the British attempt to recover Enigma rotors wiring. Oddly enough, it seems that this message was not used by the Poles to break the Enigma.
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