Hash value calculation device, hash value calculation method and hash value calculation program

摘要

PROBLEM TO BE SOLVED: To construct a computationally efficient hash function that is indifferentiable from a random oracle even when it is constructed by using an ideal compression function in which unidirectionality is broken.;SOLUTION: In constructing a hash function, a prescribed fixed value is added to an input value to a compression function used for the hash function.;COPYRIGHT: (C)2011,JPO&INPIT