An Efficient Contents Sharing Method for DRM

This paper presents a rights management method for the multiple devices of end-user. In recent years, most existing contents sharing solutions are based on Authorized Domain where legally acquired copyrighted content can seamlessly move from device to device. However, Authorized Domain systems are relatively complex and will usually increase the usage cost. In this paper, we propose an efficient contents sharing method for digital rights management system without authorized domain. In particular, we design a novel license acquisition and sharing mechanism based on ergodic encryption and machine authentication techniques. The mechanism works well in a loosely connected network environment. Our design supports efficient and flexible device alterations without expensive revocation mechanism. In addition, a novel pre-experiencing function is supported conveniently in our approach.