METHOD, DEVICE AND PROGRAM FOR PREPARING ELECTRONIC SIGNATURE VALIDITY CERTIFICATION DATA, AND METHOD, DEVICE AND PROGRAM FOR CONFIRMING JUSTICE OF ELECTRONIC SIGNATURE VALIDITY CERTIFICATION DATA, AND METHOD, DEVICE AND PROGRAM FOR CONFIRMING ELECTRONIC SIGNATURE VALIDITY

摘要

PROBLEM TO BE SOLVED: To provide a method for preparing electronic signature validity certification data by which the validity of an electronic signature on an electronic document can be appropriately confirmed.;SOLUTION: The method for preparing the electronic signature validity certification data showing that the validity of an electronic signature on an electronic document is confirmed comprises: a certification target acquiring step of acquiring the electronic signature and a first public key certificate for the electronic signature; a public key certificate confirming step of confirming validity of the first public key certificate acquired in the certification target acquiring step; a first hash value calculating step of calculating a hash value for the electronic signature and the first public key certificate; a first electronic signature preparation step of preparing an electronic signature for the hash value; and a preservation step of defining data containing at least the hash value and the electronic signature for the hash value as electronic signature validity certification data, and preserving, in a predetermined storage region, the electronic signature validity certification data.;COPYRIGHT: (C)2006,JPO&NCIPI