条件接收系统的构成

Composition of Conditional Access System

在数字电视传输系统中,为了保障授权用户收看加密电视节目,采用了复杂的条件接收系统。条件接收系统通过多层加密机制,实现对密钥的分配与管理,文章介绍了信息数据加/解扰和加/解密、用户寻址、智能卡授权、节目管理等多项技术措施,详细描述了对公钥加密的RSA算法。

In digital television transmission systems,complex conditional access systems are used to ensure that authorized users can watch encrypted television programs.The conditional access system implements the distribution and management of keys through a multi-layer encryption mechanism.This article introduces various technical measures such as encryption/descrambling and encryption/decryption of information data,user addressing,smart card authorization,and program management,and describes in detail the RSA algorithm for public key encryption.