Title :
Hierarchical Key Distribution Scheme for Conditional Access System in DTV Broadcasting
Author :
Zhu, Mengyao ; Zhang, Ming ; Chen, Xiaoling ; Zhang, Ding ; Huang, Zhijie
Author_Institution :
Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou
Abstract :
A variety of subscriptions in conditional access system (CAS) of DTV broadcasting network bring complexity to the key distribution scheme. In this paper, an innovation of hierarchical key distribution scheme for CAS in DTV broadcasting is proposed to reduce the computation of encryption and the number of messages for key refreshment. Compared with the conventional key distribution schemes, no encrypted message is distributed for key refreshment when a subscriber leaves. Further more, our hierarchical tree of key can provide a lot more dynamic management, from which broadcasters can improve efficiency in managing program channels
Keywords :
authorisation; broadcast channels; cryptography; digital video broadcasting; telecommunication security; DTV broadcasting; conditional access system; dynamic management; encryption; hierarchical key distribution; hierarchical tree; key refreshment; program channel management; Broadcast technology; Content addressable storage; Cryptography; Digital TV; Electrochemical machining; Information science; Motion pictures; Packaging; Subscriptions; TV broadcasting;
Conference_Titel :
Computational Intelligence and Security, 2006 International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
1-4244-0605-6
Electronic_ISBN :
1-4244-0605-6
DOI :
10.1109/ICCIAS.2006.295317