Method and apparatus for integrated ciphering and hashing
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United States of America Patent
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Aug 17, 2004
Issued Date -
N/A
app pub date -
Dec 30, 1999
filing date -
Jan 7, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cryptography unit having a cipher unit and a hash unit coupled in parallel for simultaneous ciphering and hashing. The cipher unit implements a cipher algorithm that operates on a data block having a first predetermined size M. The hash unit implements a hash algorithm on a data block having a second predetermined size N. Buffers of a size Q, where Q is an integer multiple of M and N, are employed to receive the input data into the present invention. A security unit that ensures that the cipher unit and the hash unit operate on the same data block of size Q is also provided.
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