Index
      
      Enigma 
                  code-breaking 50 Years
                
                   
          
          
          
           
        
      
      
      The Enigma machine is a
        cipher device developed and used in the early- to mid-20th
        century
        to protect commercial, diplomatic, and military communication.
        It was employed extensively by Nazi Germany during World War II,
        in all branches of the German military.
        The Germans believed, erroneously, that use of the Enigma
        machine
        enabled them to communicate securely and thus enjoy a huge
        advantage in World War II.
        
        The Polish Cipher Bureau developed techniques to defeat the
        plugboard and find all components of the daily key,
        which enabled the Cipher Bureau to read German Enigma messages
        starting from January 1933.
        
        1939 the Poles initiated French and British military
        intelligence representatives into their Enigma-decryption
        techniques and equipment.
        
        Bletchley Park (GB) became principal centre of Allied
        code-breaking during the Second World War,
      using the Bombe
          machine and a Colossus computer. 
         Alan Turing, Gordon Welchman, Hugh Alexander, Bill Tutte,
        and Stuart Milner-Barry. 
        
       
      J. Giesen
      2021