TY - CONF T1 - Analysis of Nonlinear Collusion Attacks on Fingerprinting Systems for Compressed Multimedia T2 - Image Processing, 2007. ICIP 2007. IEEE International Conference on Y1 - 2007 A1 - Varna,A.L. A1 - He,Shan A1 - Swaminathan,A. A1 - M. Wu KW - attacks;data KW - coding;multimedia KW - coding;security KW - collusion KW - compressed KW - compression;image KW - data;watermarking; KW - fingerprinting KW - multimedia;data KW - of KW - systems;nonlinear AB - In this paper, we analyze the effect of various collusion attacks on fingerprinting systems for compressed multimedia. We evaluate the effectiveness of the collusion attacks in terms of the probability of detection and accuracy in estimating the host signal. Our analysis shows that applying averaging collusion on copies of moderately compressed content gives a highly accurate estimation of the host, and can effectively remove the embedded fingerprints. Averaging is thus the best choice for an attacker as the probability of detection and the distortion introduced are the lowest. JA - Image Processing, 2007. ICIP 2007. IEEE International Conference on VL - 2 M3 - 10.1109/ICIP.2007.4379110 ER -