MULTIMEDIA '98 Proceedings of the sixth ACM international conference on Multimedia
A fast MPEG video encryption algorithm
MULTIMEDIA '98 Proceedings of the sixth ACM international conference on Multimedia
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 1)
Cryptography: Theory and Practice
Cryptography: Theory and Practice
A case for a multi-key secure video proxy: theory, design, and implementation
Proceedings of the tenth ACM international conference on Multimedia
Secure and Private Distribution of Online Video and Some Related Cryptographic Issues
ACISP '01 Proceedings of the 6th Australasian Conference on Information Security and Privacy
Authentication for Distributed Web Caches
ESORICS '02 Proceedings of the 7th European Symposium on Research in Computer Security
Silo, rainbow, and caching token: schemes for scalable, fault tolerant stream caching
IEEE Journal on Selected Areas in Communications
Multicast with cache (Mcache): an adaptive zero-delay video-on-demand service
IEEE Transactions on Circuits and Systems for Video Technology
Achieving simultaneous distribution control and privacy protection for Internet media delivery
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
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In ACM Multimedia'2002, a video proxy scheme was proposed for secure video delivery. In the scheme, a video is cached in proxies in encrypted form so that it remains non-disclosed even if the proxies are compromised. The proxies re-encrypt the video before its distribution, and different clients would receive different keys for the protected video. In this paper we present a security analysis on the scheme and show that the scheme is subject to collusion attack. Two or more clients working together can find out video server's secret keys and hence compromise the system. The countermeasure to the collusion attack is presented.