An attack intended to defeat forensic watermarking by means of combining different copies of a watermarked digital video in a number of ways.
Video content pirates sometimes “collude” with each other by providing copies of a certain digital asset, which are otherwise identical except for the watermark embedded in them.
Then they may interleave frames from the different copies of the video; or, they split frames into multiple sections each of which comes from different copies of the video; or, they “average” the frames from different copies of the video.
Are collusion attacks meant to bypass protection provided by certain types of forensic watermarking?
Yes.
