智能卡 广播电视有条件接收系统是一种有偿服务,电视网络经营商提供了节目服务就要能从用户那里收取到应得的服务报酬,这种服务交易不同于一般的传统市场购买交易。一个成功的付费电视系统需要有对节目不可解码的加扰方式,对密钥数据不可破译的加密方式以及能无错误地将用户与节目提供者便捷联系的方式(寻址方式)。在长期的窃视和反窃视 The conditional access system for a smart card radio and television is a paid service. The service provided by the television network operator is paid by the television network operator for the service it deserves from the user. The service transaction is different from the traditional market purchase transactions. A successful pay-TV system requires scrambled programs that are not decodable, unscrambled encryption of key data, and methods (addressing) that make it easy for users to connect program providers without errors. In the long-term theft and anti-theft