条件接收系统的构成

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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。
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)
doi:10.3969/J.ISSN.1672-7274.2023.07.017
中图分类号:TN 94 文献标志码:A 文章编码:1672-7274(2023)07-00-04
Composition of Conditional Access System
LI Ting, LI Yuzhong
(Shandong Radio and Television Station, Jinan 250014, China)
Abstract: 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.
Key words: conditional access system(CA); control word (CW); service key (SK); asymmetric encryption algorithm (RSA)
0 引言
出于安全保密、版权保护和商业利益的需要,有些数据的传输实施了加密操作。(剩余3864字)