ELECTRONIC CERTIFICATE, RECORDING MEDIUM HAVING ELECTRONIC CERTIFICATE RECORDED THEREON, AND METHOD, DEVICE AND PROGRAM FOR ISSUING ELECTRONIC CERTIFICATE, AND METHOD, DEVICE AND PROGRAM FOR DISPLAYING ELECTRONIC CERTIFICATE

摘要

PPROBLEM TO BE SOLVED: To provide an electronic certificate which allows persons to easily understand the reason for its reliability and is easy to handle and is obtained by computerizing a conventional certificate. PSOLUTION: The electronic certificate is made by embedding data including the rest or the whole of contents of a certificate and a digital signature, in image data which includes a part of contents of the certificate or does't include them at all. A device or the like for displaying the electronic certificate has a means for inputting the electronic certificate, a means for extracting embedded data, and a means for displaying the electronic certificate and data including the rest or the whole of contents of the certificate in the case of agreement of a verification result. PCOPYRIGHT: (C)2004,JPO