Method and apparatus for generating hash value

Details Method and apparatus for generating hash value Method and apparatus for generating hash value

1997-12-08

2000-10-31

Swann, Tod R.

Cryptography

Particular algorithmic function encoding

Public key

380 43, 380269, H04L 930, H04L 920

Patent

active

061414212

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.

REFERENCES:
patent: 5764772 (1998-06-01), Kaufman et al.
ISO/IEC 10118-2, "Information Technology-Security Techniques--Hash Functions: Part 2: Hash-Functions Using an N-Bit Block Cipher Algorithm" (1994).
"The MD5 Message Digest Algorithm" By, R. Rivest, IETF RFC 1321 (1992).

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