发明名称 |
Method and apparatus for generating hash value |
摘要 |
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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申请公布号 |
US6141421(A) |
申请公布日期 |
2000.10.31 |
申请号 |
US19970986390 |
申请日期 |
1997.12.08 |
申请人 |
HITACHI, LTD. |
发明人 |
TAKARAGI, KAZUO;KURUMATANI, HIROYUKI |
分类号 |
G09C1/00;H04L9/32;(IPC1-7):H04L9/30;H04L9/20 |
主分类号 |
G09C1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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