| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an authentication system, an authentication apparatus, a certificate authority, an authentication method and a program that can validate a digital certificate independently of the issuance timing and acquisition timing of a certificate revocation list. <P>SOLUTION: An authentication system 5 includes an authentication apparatus 1 for authenticating a digital certificate, and a certificate authority 2 for issuing the digital certificate. The certificate authority 2 creates a certificate revocation schedule list specifying digital certificates scheduled to be revoked, and a certificate revocation list specifying digital certificates revoked. The authentication apparatus 1 determines whether the digital certificate is included in either of the certificate revocation list and the certificate revocation schedule list, and if it is included in the certificate revocation list, notifies the revocation to a terminal apparatus 3 or, if it is included in the certificate revocation schedule list, determines whether a scheduled revocation date/time has passed. The authentication apparatus 1 notifies the terminal apparatus 3 of a scheduled revocation if the scheduled revocation date has not passed, or if it has passed, notifies the terminal apparatus 3 that it has passed. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
