Systems and methods for protecting data secrecy and integrity
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United States of America Patent
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Apr 6, 2010
Grant Date -
Mar 17, 2005
app pub date -
Sep 24, 2004
filing date -
Dec 22, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A technique for integrating message authentication with encryption and decryption is disclosed. Intermediate internal states of the decryption operation are used to generate a validation code that can be used to detect manipulation of the encrypted data. The technique is optimized with respect to processing time, execution space for code and runtime data, and buffer usage. The technique is generally applicable to a variety of block ciphers, including TEA, Rijndael, DES, RC5, and RC6.
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