ALGORITHM VARIABLE MAC GENERATION DEVICE, ALGORITHM VARIABLE HASH FUNCTION GENERATION DEVICE, ALGORITHM VARIABLE MAC GENERATION METHOD, ALGORITHM VARIABLE HASH FUNCTION GENERATION METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an algorithm variable MAC generation device, an algorithm variable hash function generation device, an algorithm variable MAC generation method, an algorithm variable hash function generation method and a program which can change algorithm by bit information of a key while ensuring security.;SOLUTION: An algorithm variable MAC generation device 1 comprises a round function processing part 100 which executes prescribed processing once or more to each of a plurality of data groups in which inputted data is delimited by a prescribed bit, and a termination processing part 200 which executes exclusive OR operation to the plurality of data groups to which processing is executed in the round function processing part 100 and generates MAC with a prescribed length. The round function processing part 100 is composed of a part in which algorithm changes corresponding to bit information of an inputted key and a part in which algorithm is always fixed.;COPYRIGHT: (C)2013,JPO&INPIT