Fingerprinting schemes for multicast delivery

Successive failure of copy prevention systems has caused copy detection to become the most promising option to protect the intellectual property of multimedia content. Fingerprinting techniques rely on invisible watermarks embedded in the copy sold in order to identify the buyer. We address the problem of security against collusion attacks in proposals for fingerprinting in a multicast environment. A proposal that combines Boneh-Shaw collusion-secure codes and encryption-based fingerprinting is presented that results in a collusion-secure fingerprinting system for multicast communications.