| 摘要 |
<p>A right management system capable of effectively performing right management such as a service reception right check processing. Group identification information which is set corresponding to a group consisting of particular devices or particular users is made to be information to be stored, and a group attribute certificate added by a digital signature of an issuer is issued to a service reception entity. When providing a service, a signature of the group attribute certificate presented is checked to judge whether or not the certificate has been altered and the group identification information stored in the group attribute certificate is examined to judge whether or not the group is a service allowed group by using the group information database. Provision of the service is decided according to the examination. Thus, it is possible to perform a unified right check for various user sets or device sets, omitting individual right information management, thereby enabling effective right management.</p> |
