ELECTRONIC SIGNATURE DOCUMENT WARRANTING METHOD, ELECTRONIC SIGNATURE DOCUMENT WARRANTING SYSTEM, AND ELECTRONIC SIGNATURE DOCUMENT WARRANTING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an electronic signature document warranting method, an electronic signature document warranting system, and an electronic signature document warranting program capable of warranting a signed document even when a signature key is disclosed.;SOLUTION: In the electronic signature document warranting system for warranting an electronic signature signed by a signature algorithm that is open to public, a signature generating terminal 11, a signature verification terminal 12, and a deposit server 13 make a signature with a plurality of different signature keys from each other by using a confidential signature algorithm.;COPYRIGHT: (C)2004,JPO