Systems and methods for protecting data secrecy and integrity
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United States of America Patent
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Dec 14, 2004
Grant Date -
N/A
app pub date -
Jan 6, 2000
filing date -
Dec 22, 1999
priority date (Note) -
In Force
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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