数字电视条件接收系统的安全性分析

Security Analysis of Conditional Access System in Digital TV

介绍了目前流行的数字电视条件接收系统(CAS)的基本加密原理,并对其安全性进行了详细分析,讨论了智能卡攻击、控制字共享等安全威胁和相应的反制措施,最后得出结论,软硬件分离的无卡CA模式是条件接收系统的发展趋势。

In this paper, the prevailing Conditional Access Systems （CAS） of digital TV and their safety problems are analyzed, including security threats of smart card and control word. Finally, it comes to the conclusion that the software-hardware detachable technology in STB is the tendency of conditional access system.