* created an electromechanical cracker, the Bombe, to determine the settings on German Enigma cipher machines from transmitted messages, allowing all intercepted German message traffic to be read. (This Ultra Secret was the biggest British secret of World War II, bigger than the Double Cross System turning of German agents and the secret of the Normandy landing.) | * created an electromechanical cracker, the Bombe, to determine the settings on German Enigma cipher machines from transmitted messages, allowing all intercepted German message traffic to be read. (This Ultra Secret was the biggest British secret of World War II, bigger than the Double Cross System turning of German agents and the secret of the Normandy landing.) |