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A historical look at decrypting the Enigma
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[QUOTE="Vanadium 50, post: 6814904, member: 110252"] Maybe this helps. One of these is a famous sentence in German through a simple substitution cipher. Another is a set of random letters. Even without knowing the plaintext, I think you can tell which is which: AAB CDE FGH IJK LHM FK ABC DAE FAE DFH IAE FH If it helps, the first has 4 pairs of duplicate letters and the latter 14. Or, if you like, the first has 13 unique letters out of 17 total. The latter has 9. In English it takes only about 30 letters to break a substitution cipher. German can't be too different. PS I thought the title was supposed to be A-historical. Or maybe an-historical. [/QUOTE]
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A historical look at decrypting the Enigma
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