条件接收系统的构成  

Composition of Conditional Access System

作　　者：李婷 李玉忠 LI Ting;LI Yuzhong(Shandong Radio and Television Station,Jinan 250014,China)

机构地区：[1]山东广播电视台,山东济南250014

出　　处：《数字通信世界》2023年第7期58-60,97,共4页Digital Communication World

摘　　要：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.

关 键 词：条件接收系统(CA) 控制字(CW) 业务密钥(SK) 非对称加密算法(RSA) 

分 类 号：TN94[电子电信—信号与信息处理]