实现基于密钥的两级条件接收系统的新方法

New Methods for the Implementation of Double-Operator Conditional Access System by Key

介绍了基于密钥的条件接收系统的基本原理,两级条件接收系统的需求和原理,阐述了两级条件接收系统的一些实现方法,并对这些方法进行了比较,说明了其应用情况。

This paper introduces the principle of Conditional Access System, the requirement and principle of Double-Operator CAS, emphasizing on the description of implementation methods of Double-Operator CAS. At the end, this paper compares these methods and introduces the application.