A Fair Anonymous Multicast Fingerprinting Scheme

Abstract

Today, much multicast fingerprint schemes have been proposed to protect the digital content's copyright in multicast environment. All of those schemes only consider the distributor's right. The generation and the embedding of the fingerprint are controlled by the distributors. Since that, the accusation against the charged redistributor, who was the subscriber in some earlier transaction, is rejected because that the distributor can also get the distributed fingerprinted copy to this subscriber. This is known as the subscriber's right problem. In Emmanuel and Kankanhalli 2003, they propose a scheme to protect both the distributor's copyright and subscriber's rights for digital video multicast. But in their scheme, they never consider the unbinding problem and the privacy of the subscriber. In this paper, we proposed an anonymous multicast fingerprinting scheme, to fix the Emmanuel and Kankanhalli's scheme by solving the unbinding problem, protecting the subscriber's privacy through a trusted third party. The result is a security, fair and anonymous multicast fingerprint protocol.