TY - CONF T1 - Nonlinear collusion attacks on independent fingerprints for multimedia T2 - Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on Y1 - 2003 A1 - Zhao,Hong A1 - M. Wu A1 - Wang,Z.J. A1 - Liu,K. J.R KW - attacks; KW - average KW - bounded KW - collusion KW - computing; KW - content KW - copies; KW - digital KW - distribution; KW - fingerprinted KW - fingerprinting; KW - fingerprints; KW - Gaussian KW - independent KW - multimedia KW - nonlinear KW - perceptual KW - quality; KW - robustness; KW - watermarking; AB - Digital fingerprinting is a technology for tracing the distribution of multimedia content and protecting them from unauthorized redistribution. Collusion attack is a cost effective attack against digital fingerprinting where several copies with the same content but different fingerprints are combined to remove the original fingerprints. In this paper, we investigate average and nonlinear collusion attacks of independent Gaussian fingerprints and study both their effectiveness and the perceptual quality. We also propose the bounded Gaussian fingerprints to improve the perceptual quality of the fingerprinted copies. We further discuss the tradeoff between the robustness against collusion attacks and the perceptual quality of a fingerprinting system. JA - Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on VL - 5 M3 - 10.1109/ICASSP.2003.1200058 ER -