A secure multicast scheme for anti-collusion fingerprinted video
In networked video applications, to protect the multimedia content after decryption, digital fingerprinting can be used to trace the illegal redistribution of multimedia by uniquely labelling each distributed copy. It is crucial to efficiently distribute the uniquely fingerprinted copies without disclosing the secrecy of the embedded fingerprints. This paper investigates the bandwidth efficient transmission of fingerprinted video. To reduce the communication cost, we explore the special structure of the fingerprint design and propose a joint fingerprint design and distribution scheme, where some fingerprinted coefficients that are shared by a subgroup of users are securely multicast to them. From the simulations, the proposed scheme reduces the bandwidth requirement by 61% to 87%, depending on the number of users and the characteristics of video sequences.