METHOD OF LOCATING A RECEIVER THAT REDISTRIBUTES CONTENT

A method of identifying from a plurality of receivers a receiver which causes a redistribution of content, the method comprising making available a watermarked version of the content to only a subset of the plurality of receivers, determining if the watermarked version is subsequently being distributed, and eliminating one or more receivers from the plurality based on the determination, until the subset comprises only the receiver which causes the redistribution, thereby identifying this receiver. Preferably a binary search algorithm is used. Also a system for distributing content to a plurality of receivers, configured to execute the method.