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As an instructor at the University of Tulsa, Christopher Swensoncould find no relevant text for teaching modern cryptanalysis? so hewrote his own. This is the first book that brings the study ofcryptanalysis into the 21st century. Swenson provides a foundationin traditional cryptanalysis, examines ciphers based on numbertheory, explores block ciphers, and teaches the basis of all moderncryptanalysis: linear and differential cryptanalysis. Thistime-honored weapon of warfare has become a key piece of artilleryin the battle for information security.