HASH VALUE GENERATING DEVICE, HASH VALUE GENERATING METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To construct a hash function easily from a stream cipher.

SOLUTION: The hash value generating device has a message enlarging unit 110, an internal condition update unit 120 and a hash value acquisition unit 130. The message enlarging unit 110 enlarges a message to a size as large as an internal condition. The internal condition update unit 120 inputs the enlarged message in the whole internal condition of a stream cipher to update the whole internal condition. The hash value acquisition unit 130 further updates the internal condition by updating conditions until the desired hash value is acquired.

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