[Cryptology] [The Cryptology Independent Study Project] The Codebreakers: Project 23.0

[The Cryptology Independent Study Project]

http://cryptology.dod.net/index.php?/archives/34-The-Codebreakers-Project-23.0.html

Read chapter twenty-three, “Ciphers in the Past Tense.” More history.  Takes about 45 minutes to read.

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