| 21. | So it is possible that the Japanese cryptanalysts knew that cipher machines were, in theory at least, breakable.
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| 22. | The Army developed their own cipher machines on the same principle as Enigma,, and from 1932 to 1941.
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| 23. | The military Enigma cipher machine, in its 3 and 4 rotor implementations had the equivalent of weak keys.
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| 24. | The British would be rewarded with a fully operational Enigma cipher machine, left behind by the German sailors.
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| 25. | The firm's cipher machine, marketed under the name " Enigma ", was initially pitched at the commercial market.
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| 26. | During the 1920s, several new cipher machines were developed generally based on using typewriter mechanics and basic electrical circuitry.
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| 27. | It's exhibits feature tools of spycraft ranging from a lipstick pistol to an Enigma cipher machine to miniature cameras.
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| 28. | The "'Japanese M-1 cipher machine "'was a mechanical device the Japanese used for performing cryptography sometime during the 1930s.
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| 29. | The US " Hagelin " field cipher machine and the French " Anglp " code were also often read.
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| 30. | Were the Army cryptanalysts good enough to understand that random numbers were more secure, when used correctly, than cipher machines?
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