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A recommended read for anyone wanting a more indept and less historical look at this topic.
So I drifted along reading other, easier, books about programming, operating systems, computer security and the like ...until recently my girlfriend gifted me "The Code Book", by Simon Singh. Pure popular science hokum, of course, but a very jolly read nonetheless, and it (specifically the cryptanalysis challenge at the end) re-ignited my earlier, misguided, fascination.
"Decrypted Secrets" (subtitled "Methods and Maxims of Cryptology") is divided into two parts: firstly cryptography, starting with simple concepts, getting mathematical very quickly and proceeding to harder things. I still get stuck in here, but I assure you it's really very precise and thorough. It looks it anyway. The second half is on cryptanalysis - the main reason I dusted it off - and once you get rolling in it all makes good sense. I shan't go on. Let me conclude, though, by saying that I am certain "Decrypted Secrets" provides an ideal technical complement to the history provided by David Kahn's "The Codebreakers". Erm, which I also haven't finished. High praise though. I think. Yes.
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