Collusion Attack to a Scalable AND-ACC Fingerprinting Scheme

Since it is easy to edit and perfectly produce a pirate copy, the copyright protection of digital object (e.g., audio, image and video) becomes an important concern. For example, the annual report by the Cable and Satellite Broadcasting Association of Asia (CASBAA),? which studied TV markets across 11 Asian countries, said the number of illegal connections is expected to have risen 20% to $5.2 million in 2006, and pay-TV piracy in Asia is estimated to cost the industry $1.13 billion in 2006, up 6.6% from 2005. Digital watermarking embeds owner information into the digital content so as to solve the problem of copyright protection. One application of watermarking for copyright protection is ownership protection (e.g. ). The owner of an object embeds her logo into the object and then distributes the watermarked object. The owner can claim the ownership by extracting her logo from the object.