A Secure Content Distribution Based on Chaotic Desynchronization

Multimedia fingerprinting is an emerging technology that provides a method for protecting multimedia content from unauthorized redistribution. Collusion attack is a cost-efficient attack for fingerprinting schemes where classes of users combine their fingerprinted copies for the purpose of attenuating or removing the fingerprints. However, with the increase of the number of colluders, the efficiency of detection will decrease accordingly. This paper identifies a novel secure content distribution framework based on chaotic desynchronization. Wherein the host signal is chaotically desynchronized to get many different copies, which are fingerprinted and delivered to users. The use of fingerprinting along with encryption can provide a double-layer of protection to digital media. Theory analysis and experimental results show that the proposed distribution scheme outperforms the scheme without chaotic desynchronization even a small number of colluders by large margins.