Password authentication with insecure communication
Communications of the ACM
One-Way Cross-Trees and Their Applications
PKC '02 Proceedings of the 5th International Workshop on Practice and Theory in Public Key Cryptosystems: Public Key Cryptography
Digital rights management for content distribution
ACSW Frontiers '03 Proceedings of the Australasian information security workshop conference on ACSW frontiers 2003 - Volume 21
Separating encryption and key issuance in digital rights management systems
ACISP'03 Proceedings of the 8th Australasian conference on Information security and privacy
Scalable protection for MPEG-4 fine granularity scalability
IEEE Transactions on Multimedia
Overview of fine granularity scalability in MPEG-4 video standard
IEEE Transactions on Circuits and Systems for Video Technology
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We propose two symmetric-key management schemes for the encryption of scalable compressed video content. The schemes are applicable to MPEG-4 Fine Grain Scalability video coding. Our constructions make only use of hash functions and achieve the optimal bound regarding the minimum number of keys and the time complexity in computing all the decryption keys. We also formalize new security notions about collusion-resistance. Unlike prior key management schemes, our second scheme resists to certain collusion attacks. The collusion-resistance achieved is practical and hence sufficient for encryption of scalable video streams.