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| | Enigma_machine |
 | | However, the reflector also gives Enigma the property that no letter can encrypt to itself; this property was exploited by codebreakers: it was a severe conceptual flaw, a cryptological mistake. |
 | | In the Wehrmacht Enigma, the reflector is fixed and does not rotate, and appeared in four versions. |
 | | The Swiss used a version of Enigma called model K or Swiss K, for military and diplomatic use, which was very similar to the commercial Enigma D. The machine was broken by a number of parties, including Germany, France, Britain and the United States (the latter codenamed it INDIGO). |
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