| abstract |
(57) [Problem] To provide a backup / restore system capable of restoring backup data even when a backup execution terminal fails. A terminal has a client ID and an LT. Is transmitted to the rights management server 710 by attaching a part or all of it to the backup request, and the rights management server 710 It is determined from the client ID whether or not the request source is a registered user, and from the data identification ID of the LT, whether or not the data itself is the right data issued to the registered user. In this case, the right data is backed up. The terminal 140 attaches the client ID to the restore request and And the rights management server 710 sends the client ID , And restores the rights data backed up in association with the user ID to the terminal 140. |