CERTIFICATE MANAGEMENT APPARATUS AND CERTIFICATE MANAGEMENT METHOD

摘要

The present invention provides a certificate management apparatus that can retain important certificates, while erasing a certificate referred to most previously. An update determination information output unit outputs update determination information that is information to be used for determining whether to update a certificate. A certificate cache stores the certificate on volatile memory. An arithmetic unit causes the certificate and the update determination information outputted by the update determination information output unit to be stored in the certificate cache in correspondence with each other, and updates, on the basis of the update determination information stored in the certificate cache, the certificate that is in correspondence with the update determination information.