How to use cryptography to protect data in teleprocessing systems--not only keeping data secret but also authenticating it, preventing alteration, and proving its origin. Approach is pragmatic--principles are illustrated with examples. Describes ciphers, the Data Encryption Standard, ways to use the ciphers, cipher key management schemes, public key ciphers, and how to apply data security measures to electronic funds transfer and teleprocessing.

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Book by Davies D W Price W L

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