An innovative revocation scheme for one-to-many E-services
Electronic Commerce Research and Applications
Secure distribution of heterogeneous multimedia content on the internet
International Journal of Internet Protocol Technology
A Hierarchical Key Distribution Scheme for Conditional Access System in DTV Broadcasting
Computational Intelligence and Security
Key Management Schemes for Peer-to-Peer Multimedia Streaming Overlay Networks
WISTP '09 Proceedings of the 3rd IFIP WG 11.2 International Workshop on Information Security Theory and Practice. Smart Devices, Pervasive Systems, and Ubiquitous Networks
Implementation of H.264 transcoding & selective encryption of bit stream
ICACT'09 Proceedings of the 11th international conference on Advanced Communication Technology - Volume 3
Group-oriented channel protection for mobile devices in digital multimedia broadcasting
ISCIS'05 Proceedings of the 20th international conference on Computer and Information Sciences
Key distribution for Pay-TV system with reduced computation cost using XOR operation
ADCONS'11 Proceedings of the 2011 international conference on Advanced Computing, Networking and Security
Hierarchical approaches for multicast based on Euclid's algorithm
The Journal of Supercomputing
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Conditional access system (CAS) is the essential basis of a digital pay-TV system, which is used to prevent unauthorized access to audio/video data and ensure the benefit of the service providers. In the CAS, key distribution is an essential part, whether the distribution scheme succeeding or not can directly affect the security of the CAS. In this paper, based on four-level key hierarchy, a new key distribution scheme based on grouping access control for conditional access system in digital pay-TV system is presented, in which we adopt the new scheme to generate and distribute authorization key and group key more efficiently. Our key distribution scheme can greatly reduce computation overhead and the complexity while providing higher security. Moreover, the proposed scheme is scalable in processing joining and leaving of subscribers, which makes service provider easy to manage the subscribers dynamically. In the end, we analyze the security and performance of the proposed scheme and compare it with other schemes. It shows that our proposed scheme is efficient and suitable for a digital pay-TV system which can provide both PPC and PPV services and is feasible for practical application.