DIGITAL TERRESTRIAL BROADCASTING SYSTEM, DIGITAL TERRESTRIAL BROADCASTING RIGHT PROTECTION DEVICE, DIGITAL TERRESTRIAL BROADCASTING RIGHT PROTECTION METHOD, AND PROGRAM

摘要

There is provided a digital terrestrial broadcasting system for performing digital broadcast between a broadcast station and one ore more receivers by using a ground wave. A management mechanism receives a right protection LSI from an LSI manufacturer and supplies the right protection LSI containing key information and the like to a receiver manufacturer. A viewer receives a receiver from the receiver manufacturer and receives free broadcast broadcasted from a broadcast station. The management mechanism transmits a lot number related to the free broadcast, work key Kw update information, and revoke information. The broadcast station performs free broadcasting (digital terrestrial broadcasting) by transmitting a broadcast signal together with encrypted update information such as a work key Kw. The receiver receives free broadcasting and answers to the work key Kw update and revoke instruction.