Date Added: Nov 2011
A DRM system scheme based on PKI is proposed and designed in this paper, which can achieve effective user authentication, secure distribution of digital content and usage rights control. The architecture of system, secure mechanism, playback control mechanism are described in detail. Finally, against the offline usage control of the audio and video content in user terminal, the authors design a system framework mainly comprising the encryption and decryption of digital content, generation and distribution of license and secure usage control, and implement a prototype system -DRM Player in C++. This scheme and its prototype effectively assure authorized usages and copyright protections of the audio and video content in the whole life cycle.