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The German Enigma Cipher Machine: Beginnings, Success, and Ultimate Failure. By Brian J. Winkel, Cipher A. Deavours, David Kahn, and Louis Kruh; published by Artech House, 800/225-9977 (phone), (Web); 450 pages; $95.
In the world of information systems, software technologies are frequently obsolete within a decade, and hardware in less time than that. So a book about an 80-year-old cryptographic device would seem to be as useful as a maintenance guide for a Model T. There...