[Cryptology] [The Cryptology Independent Study Project] The Codebreakers: Project 16.0

[The Cryptology Independent Study Project]

http://cryptology.dod.net/index.php?/archives/27-The-Codebreakers-Project-16.0.html

Read chapter sixteen, “Censors, Scramblers, and Spies.”  This chapter discuses methods of obfuscation rather than real security.  It is primarily concerned with steganography, but is still a worthwhile read.  Pages 522-524 will talk about the different types of invisible ink.  There is a type of quadratic code discussed on pages 546-547 used for phone conversations, and a more interesting system that works directly on speech on pages 551-554.  There is also an interesting innovation for breaking such systems on pages 559-560.  Takes about 2.25 hours to read.

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