CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
The Design of Rijndael
Self-Healing Key Distribution with Revocation
SP '02 Proceedings of the 2002 IEEE Symposium on Security and Privacy
Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
An efficient authentication scheme for access control in mobile pay-TV systems
IEEE Transactions on Multimedia
FDAC: Toward Fine-Grained Distributed Data Access Control in Wireless Sensor Networks
IEEE Transactions on Parallel and Distributed Systems
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Efficient key distribution schemes for secure media delivery in pay-TV systems
IEEE Transactions on Multimedia
IEEE Transactions on Multimedia
Efficient Key Distribution for Access Control in Pay-TV Systems
IEEE Transactions on Multimedia
Flexible-Pay-Per-Channel: A New Model for Content Access Control in Pay-TV Broadcasting Systems
IEEE Transactions on Multimedia
A Cost-Efficient Secure Multimedia Proxy System
IEEE Transactions on Multimedia
Soft handover mechanism based on RTP parallel transmission for mobile IPTV services
IEEE Transactions on Consumer Electronics
The VersaKey framework: versatile group key management
IEEE Journal on Selected Areas in Communications
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Current mobile pay-TV systems have two types of Conditional Access Systems (CAS): group-key-based and public-key systems. The best feature of group-key-based systems is the ability to enjoy the broadcast nature in delivery multimedia contents, while the major advantage of public-key systems is consolidating the security foundation to withstand various attacks, such as collusion attacks. However, the problems of group-key-based systems include collusion attacks, lack of nonrepudiation, and troublesome key distribution. Even worse, the benefit of broadcast efficiency is confined to a group size of no more than 512 subscribers. For public-key systems, the poor delivery scalability is the major shortcoming because the unique private key feature is only suitable for one-to-one delivery. In this article, we introduce a scalable access control scheme to integrate the merits of broadcasting regardless of group size and sound security assurance, including fine-grained access control and collusion attack resistance. For subscriber revocation, a single message is broadcast to the other subscribers to get the updated key, thus significantly boosting subscriber revocation scalability. Due to mobile subscribers' dynamic movements, this article also analyzes the benefit of retransmission cases in our system. Through the performance evaluation and functionality comparison, the proposed scheme should be a decent candidate to enhance the security strength and transmission efficiency in a mobile pay-TV system.