ABSTRACT
This chapter reviews the research problems that may intrigue the reader to pursue solving them. Significantly increased levels of multimedia piracy over the last decade have put the movie and music industry under pressure to deploy a standardized antipiracy technology for multimedia content. The problem of ensuring copyright of multimedia at the client side lies in the fact that traditional data protection technologies such as encryption or scrambling cannot be applied exclusively, as they are prone to digital copying or analog rerecording. Blind pattern matching is a new breed of signal processing attacks that does not use any or uses very limited knowledge of the protection algorithms. The main target of an adversarial attack on a content protection system is finding a signal processing primitive that removes the watermark or prevents a detector to find it, or both. The key to the success of the blind-pattern-matching attack is the existence of repetitive content across one or several multimedia clips.
