SCRAMBLE KEY MANAGEMENT APPARATUS, SCRAMBLE KEY MANAGEMENT INFORMATION TRANSMITTING APPARATUS, SCRAMBLE KEY OUTPUT MANAGEMENT METHOD, SCRAMBLE KEY MANAGEMENT PROGRAM, LICENSE INFORMATION MANAGEMENT APPARATUS, LICENSE MANAGEMENT INFORMATION TRANSMITTING APPARATUS, LICENSE INFORMATION OUTPUT MANAGEMENT METHOD, AND LICENSE INFORMATION MANAGEMENT PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive scramble key management apparatus capable of managing a scramble key on the basis of individual contract information even in a narrow band broadcast and ensuring security. SOLUTION: The scramble key management apparatus 7 comprises: a ECM decoding means (scramble key management information decoding means) 75 for decoding ECM resulting from encrypting a scramble key and individual contract information containing contract information indicating contract states of a plurality of content receivers 3 disposed on the basis of receiver IDs for identifying each of the content receivers 3; a contract information acquisition means (permission information acquisition means) 76b for acquiring contract information of a corresponding content receiver 3 from the individual contract information on the basis of a receiver ID; and a contract state discrimination means (permission state discrimination means) 76c for discriminating a contract state on the basis of the contract information and outputting the scramble key to a content decoder 5 if it is discriminated that a contract has been made. COPYRIGHT: (C)2007,JPO&INPIT