Secure Fingerprint Embedding for Multicast

In the applications of multimedia fingerprinting schemes, such as IPTV, the number of potential users can be large as millions. So many user set demands not only high robustness of fingerprints but also high bandwidth efficiency and security of the whole system. We propose a secure fingerprint scheme embedding fingerprints at the client side while decryption. It not only solved the confliction of single copy transmission for multicast and multiple unique fingerprinted copies, but also shortened the length of decryption signals greatly, so the bandwidth efficiency is high. It also enhanced the entire system´s security and the robustness of the fingerprints than former schemes.