Patent ID: 8433911

Claim:
A content management server comprising: a receiver configured to receive, from a first device adapted to read content from a recording medium and run the content, a first device identifier identifying the first device and a recording medium identifier identifying the recording medium loaded in the first device, along with a digital signature generated in the first device using an encryption key secretly stored in the first device; a signature verification unit configured to verify that the recording medium is loaded in the first device by verifying the authenticity of the digital signature; a storage unit configured to store a table that maps the first device identifier to a second device identifier identifying a second device adapted to acquire content by downloading the content and to run the content accordingly; and a voucher issuance unit configured to issue a voucher related to the content of the recording medium to a user account of the first device and the second device, when it is confirmed that: (i) the recording medium is loaded in the first device, and (ii) the second device is to the first device by referring to the table.