Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
November 16, 2021
Patent Application Number
16478806
Date Filed
February 22, 2017
Patent Primary Examiner
Patent abstract
A message authenticator generation apparatus (10) generates a message authenticator using a block cipher E having a block size n. A hash function unit (21) calculates a hash value w with a hash function h having an output length longer than n bits, taking as input a message M. A post-processing unit (22) performs calculations using the block cipher E on the hash value w calculated by the hash function unit (21), so as to calculate a message authenticator T not larger than the block size n for the message M.
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