Efficient key distribution for access control in pay-TV systems

被引：22

作者：

Wang, Shyh-Yih ^{[1
]}

Laih, Chi-Sung ^{[2
,3
]}

机构：

[1] Natl Kaohsiung Normal Univ, Dept Optoelect & Commun Engn, Kaohsiung 802, Taiwan

[2] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 701, Taiwan

[3] NCKU, Comp & Network Ctr, Tainan, Taiwan

来源：

IEEE TRANSACTIONS ON MULTIMEDIA | 2008年 / 10卷 / 03期

关键词：

access control; hierarchy; key distribution; pay-TV;

D O I：

10.1109/TMM.2008.917417

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The conditional access system (CAS) is an essential part of digital pay-TV systems for controlling access to the program services. Conventionally, due to the restrictions of bandwidth and computational capability, a CAS only supports period subscription services that are charged on a monthly basis. In this paper, based on the concept of hierarchical key assignment, we propose three key distribution schemes for the access control of pay-TV systems. With these schemes, a CAS can support more charging strategies for service providers, such as adopting a smaller charging unit and allowing a subscription of any subset of channels with little communication and computational overhead. In addition, the piracy management problem can also be dealt with easily.

引用

页码：480 / 492

页数：13

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