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Efficient and secure conditional access system for pay-TV systems

机译:付费电视系统的高效安全的条件接收系统

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摘要

In Digital TV service, subscribers get the access of channels of their interest. In Conditional Access Systems (CAS), multimedia content is delivered securely using the Control Word (CW). To frequent update of the CW, a large number of messages are exchanged in the conventional key distribution systems. In this paper, a centralized key distribution scheme based on dynamicity of the groups and with freedom of channel package composition is proposed. Scheme has also efficient mechanism of load balancing at Group Controller (GC) side. To speed up the search of the channel package in the existing database, Optimal Binary Search Tree (OBST) data structure and Finite State Machine (FSM) are used. Scheme also provides the efficient leaving and joining mechanism for single user as well as batch users.
机译:在数字电视服务中,订户可以访问自己感兴趣的频道。在条件接收系统(CAS)中,使用控制字(CW)安全地传递多媒体内容。为了频繁更新CW,在传统的密钥分配系统中交换了大量消息。本文提出了一种基于群组动态和信道包组成自由的集中式密钥分发方案。该方案还在组控制器(GC)端具有有效的负载平衡机制。为了加快现有数据库中通道包的搜索速度,使用了最佳二进制搜索树(OBST)数据结构和有限状态机(FSM)。 Scheme还为单用户和批用户提供了有效的离开和加入机制。

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