Method and apparatus for generating hash value
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United States of America Patent
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Oct 31, 2000
Grant Date -
N/A
app pub date -
Dec 8, 1997
filing date -
Dec 10, 1996
priority date (Note) -
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Abstract
A method and apparatus for generating a highly secured hash value without deteriorating the processing speed is provided. A hash function such that when a message M is given, the message M is compressed so as to have a certain kind of characteristics of cipher is realized. In a step, (1) one to one expanding process so that divided data of the message is inputted and longer data is outputted is executed, and (2) a plurality of cyclic shifting processes in which the number of shifting is different are executed. Consequently, the hash function can be calculated at higher speed than a conventional method of simple repetitive compression of divided data of a message.
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