Patent ID: 7836311

Claim:
An information processing apparatus of a client for receiving a usage right corresponding to an encrypted content, the information processing apparatus comprising: means for generating, after the client purchases the content, a restoration request file and storing the restoration request file on the information processing apparatus of the client; means for storing usage right identifying information, the usage right identifying information identifying the usage right corresponding to the content, the usage right being initially issued to the information processing apparatus by a license server; means for transmitting a restoring request to restore the usage right identifying information using backup data, the restoring request including client identifying information for identifying the information processing apparatus, and data for verifying the restoring request, the data for verifying the restoring request including a hash value calculated based on a first encryption key specific to the information processing apparatus, wherein transmitting the restoring request includes uploading the restoration request file; means for receiving a response to the restoring request including reissued usage-right identifying information corresponding to the usage right; means for transmitting, to the license server, a usage-right request including the reissued usage-right identifying information; and means for receiving the usage right corresponding to the content from the license server.