Title :
Conditional Access System for Digital Broadcasting in Japan
Author :
Yoshimura, Toshiro
Author_Institution :
Corporate Planning Bur., NHK, Tokyo, Japan
Abstract :
A conditional access system (CAS) specification for satellite and terrestrial digital broadcasting in Japan has been developed and in operation since December 2000. The specification assumes there are two or more digital broadcasters and they have different business models. It enables them to do business on a common platform, by ensuring that the portion that does not relate to the security functions has been made as much as possible, into an open standard. The system features a three-layer key structure, MULTI-2 as a scramble algorithm,and an IC card as the security device of a receiver. Moreover, the rights protection system has been standardized for this CAS system and has been used in operation.
Keywords :
copy protection; direct broadcasting by satellite; open systems; standards; IC card; MULTI-2 scramble algorithm; business models; conditional access system; copyright protection; digital TV; open standard; rights protection system; satellite digital broadcasting; security device; terrestrial digital broadcasting; three-layer key structure; Content addressable storage; Cryptography; Degradation; Digital control; Protection; Radio broadcasting; Receivers; Satellite broadcasting; Security; TV broadcasting; Access control; copyright protection; digital TV; security;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/JPROC.2005.859708
