Attacks on Collusion-Secure Fingerprinting for Multicast Video Protocols
DFMA '05 Proceedings of the First International Conference on Distributed Frameworks for Multimedia Applications
Geometric Attacks on Image Watermarking Systems
IEEE MultiMedia
Watermarking attack: security of WSS techniques
IWDW'04 Proceedings of the Third international conference on Digital Watermarking
Temporal synchronization in video watermarking
IEEE Transactions on Signal Processing - Part II
Secure Video Multicast Based on Desynchronized Fingerprint and Partial Encryption
IWDW '07 Proceedings of the 6th International Workshop on Digital Watermarking
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Till now, few desynchronization methods for video fingerprint have been presented, which are implemented in raw data. In this paper, a compression compliant video desynchronization method for collusion resilient fingerprint is proposed. The technique can simultaneously apply random space/time desynchronization and compression to videos. In our experiments, with little visual degradation, the joint process costs no more time and bandwidth than those of MPEG2 encoding/decoding. By this method, the video quality degrades dramatically for colluded copies. Besides evaluating the method by compression quality, compression time, and visual quality, we also discussed the system security. Two attacks are considered for the security evaluation: re-synchronization attack (including Most Similar Frame Collusion and Random Similar Frame Replacement) and re-desynchronization attack. Schemes for robustness to these attacks are also shown. Two theorems are presented to point out the security limit of single time desynchronization and single space desynchronization and the influence of related parameters to security.