DRM Licensing Design for Interactive Rebuilding of DTV in China

Digital rights management (DRM) is an efficient method to protect digital content in various applications such as digital TV, IPTV, video on demand, etc. In China, the legal and administration systems, business models and industrial chain are different from those of other countries and therefore have special requirements on DRM technologies. In this paper, we propose a new licensing design to extend the classic DRM architecture where the new system takes into account the commercial integrity, central monitoring, and potential user scalability. We propose a licensing method of secure audit report and mass-license, with architecture of linked license portals and license issuers as basic insurance. The extension does not impact on the security of former DRM systems, and is compatible with the PKI-based trust model.