Collusion issue in video watermarking

Doërr, Gwenaël J;Dugelay, Jean-Luc
"Traitement du Signal", Volume 22, N°6, December 2005

Security evaluation of released watermarking algorithms has recently become a major concern. In this perspective, it is worth evaluating the importance of the threat of collusion attacks. These attacks combine several watermarked documents to produce unwatermarked content. In video, such a strategy is all the more critical since each individual video frame can be seen as a single watermarked document. Once different weaknesses against collusion attacks have been exhibited, a novel signal coherent watermarking strategy is presented. The goal is to generate a watermark signal coherent with the redundancy of the host video signal, should it be temporal or spatial, so that the embedded watermark is immune against collusion attacks

Sécurité numérique
Eurecom Ref:
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