Secure Digital Contents Distributing System on P2P Networks

In recent years, the file-sharing applications of peer-to-peer （P2P） systems, such as Napster, Bit-Torrent （BT）, Gnutella, have become very popular, with BT offering particularly high sealability and efficiency service to transmit files. But BT does not enforce the access control process, so a lot of unauthorized files are freely shared. In this paper, we proposed a digital rights management （DRM） system for BT environment to solve the serious piracy issue by using lightweight encryption methods in order to he adopted by small mobile devices in wireless environment.