DATA DISTRIBUTION SYSTEM AND ITS METHOD, DATA RECEIVER, DATA SERVICE DEVICE AND ITS METHOD, AND DATA DELIVERY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a contents distribution system with which a right holder can directly control the use of contents data without the aid of a broadcasting entrepreneur while the holder is in the state of capable of connecting a standard I/F and a contents processor. SOLUTION: A contents owner 200 superposes copy control information by using a digital watermark, and provides the broadcasting entrepreneur 300 with encrypted contents data. The broadcasting entrepreneur 300 distributes by performing encryption for a conditional access. A set top box 500 which received the contents data firstly performs decoding for the conditional access, and secondly performs decoding by using an encryption key distributed by the contents owner 200. Then, the set copy control information is read by extracting digital watermark information, and thus an output from the set top box 500 is controlled.