PUBLIC BENEFIT REPORTING SYSTEM, DEVICE, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To specify a reporter while releasing anonymity of a signature by a request of a signified reporter in nominated identifier ring signature.;SOLUTION: During execution of a nominated identifier ring signature protocol a signature digest h(M||h(S_R))generated by a unidirectional function from an electronic signature S_R with respect to an anonymous reporting message M is transmitted to an identifier apparatus 500. By transmitting to the identifier apparatus 500 the electronic signature S_R resulting in signature digest after the execution of the signified reporter ring signature protocol, an identifier apparatus 500 confirms that the same signature digest h(M||h(S_R)) can be generated by the unidirectional function from the electronic signature S_R, to release anonymity.;COPYRIGHT: (C)2008,JPO&INPIT