Enigma was by no means the only cipher machine used by the Germans during WWII In fact the Enigma, of which over ,000 units were produced, was mainly used at a tactical level, whilst the German High Command (OKW) used other machines, such as the Siemens T52 Geheimschreiber and the Lorenz SZ40/42 teleprinter addon They broke the German Enigma system of codes () The machine and system were so advanced and complicated the Nazi believed the code to be unbreakable Rejewski theorized about how the machine worked and assembled a team to break the code By 1933 the team had broken the code in use at the timeThe main focus of Turing's work at Bletchley was in cracking the 'Enigma' code The Enigma was a type of enciphering machine used by the German armed forces to send messages securely Although Polish mathematicians had worked out how to read Enigma messages and had shared this information with the British, the Germans increased its security at the outbreak of war by
Second World War German Enigma Machine Stock Photo Alamy
German enigma codebook