Patent ID: 7760988

Claim:
A content use device for using composite content recorded on a recording medium, the composite content including a plurality of pieces of content that are respectively protected by a plurality of different protection methods, the content use device comprising: an acquisition unit operable to acquire a designation of one of the plurality of pieces of content; a judgment unit operable to judge whether the designated piece of content is usable, based on contract information relating to use of the designated piece of content; a selection unit operable to select one of the plurality of pieces of content, according to a result of the judgment by the judgment unit; a determination unit operable to determine, from among the plurality of different protection methods, one protection method that corresponds to the selected one piece of content; a decryption unit operable to decrypt the selected one piece of content based on the determined protection method; and an output unit operable to output the decrypted piece of content.