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A comment on Cracking the Adventure Time cipher. Parent comment

Re:Cracking the Adventure Time cipher by Analemma_ on Monday August 01, 2016 @04:06PM (#12205477)
You're right, it looks like my scheme is equivalent to a Vignère cypher with "ABCDEFGHIJKLMNOPQRSTUVWXYZ" as the key, with the weaknesses thereof. Thanks!
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Re:Cracking the Adventure Time cipher by bdr on Monday August 01, 2016 @04:52PM (#12205844)
You might be interested to read "Cryptanalysis: A Study of Ciphers and Their Solution", a 1939 (!) book by Helen Fouché Gaines. It covers a lot of these kinds of variants.
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