..
Ripster:
Yes, I belive you mentioned that book and author in a previous thread some time ago.
And also a good read, but dated, is David Kahn, "The Codebreakers".
Do try reading "Applied Cryptography" by Bruce Schneier ISBN 0-471-59756-2
This book is rather heavy and painful in mathematics; almost as if Steven Hawking does crypto for the layman. (Yeah, just like his "Brief History of Time...)
.......
Spec_57