An efficient secure communication between set-top box and smart card in DTV broadcasting
ASIACCS '06 Proceedings of the 2006 ACM Symposium on Information, computer and communications security
An innovative revocation scheme for one-to-many E-services
Electronic Commerce Research and Applications
A Hierarchical Key Distribution Scheme for Conditional Access System in DTV Broadcasting
Computational Intelligence and Security
Cryptanalysis of Secure Key Exchange Protocol between STB and Smart Card in IPTV Broadcasting
ISA '09 Proceedings of the 3rd International Conference and Workshops on Advances in Information Security and Assurance
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
An efficient authentication scheme for access control in mobile pay-TV systems
IEEE Transactions on Multimedia
DRM protected dynamic adaptive HTTP streaming
MMSys '11 Proceedings of the second annual ACM conference on Multimedia systems
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
Secure communication in IPTV broadcasting
The Journal of Supercomputing
Enhanced authentication for commercial video services
Security and Communication Networks
A variant of non-adaptive group testing and its application in pay-television via internet
ICT-EurAsia'13 Proceedings of the 2013 international conference on Information and Communication Technology
A conditional access system with efficient key distribution and revocation for mobile pay-TV systems
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
A hybrid user authentication protocol for mobile IPTV service
Multimedia Tools and Applications
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To provide secure media delivery in pay-TV systems, a large number of messages are exchanged for key updates in the conventional key distribution schemes. This is inefficient and costly when the client side (set-top box) uses a smart card with limited computing power. In this paper, we present three key distribution schemes for channel protection and secure media delivery in pay-TV systems. With the proposed schemes, encryption keys of the subscribed programs can be efficiently and securely distributed to the authorized subscribers. Only one message is needed to renew key in the key distribution schemes for subscription channel protection. In addition, we use simpler computation functions, including one-way hash function and exclusive-OR operation, for key updates to reduce the computation cost. With our key distribution schemes, only authorized subscribers can watch the subscribed programs correctly. Unauthorized subscribers have no information to retrieve the correct programs over the networks. Thus, service providers can charge their subscribers according to their subscriptions, and the illegal access of the media and video programs from networks can be prevented, based on the proposed schemes.