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Abwehr Air Force Allied Antoni Palluth armed forces armored attack August Bertrand Bletchley Park bomb breaking Britain British Bruno Cadix chief Ciezki Cipher Bureau cipher machine Colonel communications connections cryptological cryptological bomb cryptologists cyclometer daily keys divisions enciphered encipherment enemy Enigma cipher Enigma decryptment Enigma keys Enigma machine Enigma message evacuation French German Army German ciphers German naval Gustave Bertrand Gwido Langer headquarters Henryk Zygalski High Command Hitler intercepts Jerzy Rozycki June Kesselring Langer later letters Lisicki London Luftwaffe machine cipher Marian Rejewski mathematicians mathematics Mayer message keys method monitoring Navy Nazi North Africa obtained officers operations Panzer Paris permutation personnel Poland Poles Polish General Staff possible Poznan radio intelligence reconstruct Rejewski and Zygalski reversing drum Richard Woytak Rommel rotors Rozycki sent September signals solved southern France stations tion U-boats units Vichy Warsaw Wehrmacht Welchman Winterbotham Woytak