A rare 1944 four-rotor M4 Enigma cipher machine ... Allied successes against the Enigma was made public. "The machine's use of 4 rotors, instead of 3, and the operator's ability to select these ...

An extremely rare German four-rotor M4 Enigma cipher machine from the Second World War has set a new world auction record at a Christie's sale at Rockefeller Center in New York. The property of an ...

The names of Alan Turing and the Enigma encryption machine have ... All told, with a three-rotor encryption machine such as the one I saw today, the number of cipher permutations you could churn ...

The Enigma machine was an electro-mechanical rotor cipher machine used by the German navy to encrypt and decrypt messages passing from shore to ships at sea. They considered their codes unbreakable ...