Content reproduction apparatus and content reproduction control method

摘要

A content replay apparatus which enables secure and extensible content use control in general-purpose terminals. In this apparatus, at license processing application (20), license data processing section (202) performs update of license data, creation of use authorization information, and storage of the updated license into data memory area (102) with the intermediation of license receiving and providing section (201). Signature section (203) creates a use authorization certificate by affixing a signature made by using signature function (104) of secure device (10) to the use authorization information. Sending section (204) sends an encrypted content decrypting key with the use authorization certificate attached thereto to receiving section (301) of decoder I/F library (30). At decoder I/F library (30), determination section (302) renders determination on the authenticity of the signature and on the authenticity of the use authorization information by using dynamic information contained in the use authorization information.