Risk-distortion analysis for video collusion attack

13 years 11 months ago

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Collusion attack is a cost-effective attack against digital ﬁngerprint. To develop an efﬁcient collusion-resistant ﬁngerprint scheme, it is very important for the detector to study the behavior of the colluders and the performance of collusion attack. Although several prior works have been proposed in the literature to analyze the performance of collusion attack, few effort has been made to explicitly study the relationship between risk, i.e., the probability of the colluders to be detected, and distortion of collusion attack. In this paper, we investigate the risk-distortion relationship of the linear video collusion attack with Gaussian ﬁngerprint. We formulate the optimal linear collusion attack as an optimization problem, where the colluders try to minimize the distortion subject to a risk constraint. For any ﬁxed risk constraint, the optimal distortion can be found using numerical optimization methods. By varying the risk constraint, we can obtain the risk-distortion mo...

Yan Chen, W. Sabrina Lin, K. J. Ray Liu

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