Enigma Cypher Machine 1940 

The German Enigma cypher machine was produced in various models from its creation in 1919, through its subsequent adoption by the German Navy (1926), German Army (1928) and German Air Force (1935) and later by other agencies such as the Sicherheitsdienst. The Engima was used to encypher and decypher messages. Pictured is a machine from about 1940. The Allies developed computing devices to break the Enigma cyphers. (Ref. "Code Breakers," F.H. Hinsley'; A. Stripp) (Photo courtesy of NSA). See also Bletchley Park and Colossus. See also Bibliography: Wartime Computing