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1937 CE
The Japanese invent the Purple Machine which uses telephone stepping relays instead of rotors. |
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1939 CE
The Allies get their first look at a German Enigma machine after Polish intelligence steals it. |
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1940 CE
The first Bombe arrives in Bletchley Park. It is based on Alan Turing's design. British cryptanalysts use it to break German Enigma machine signals. |
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1940 CE
Captain Midnight radio show features the "Code-O-Graph". |
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1942 CE
The United States begins using Navajos code talkers. |
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1944 CE
The U.S. Army begins using Sigaba a.k.a. the ECM Mark II to encrypt their communications. |
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