A Digital Interface-based Digital Rights Management Scheme for Digital Cinema

Digital rights management (DRM) is indispensable to prevent various kinds of illegal content usage. In this paper, we present a Digital interface-based DRM scheme (DI-DRM) for digital cinema, which can provide a new multi-interfaces oriented DRM solution for digital cinema. The authentication protocol and the encryption algorithm are described in detail. The two kinds of digital interfaces-based DRM prototype system are developed. Security and performance analysis show the proposed scheme has several advantages. First, it is more secure than the existing scheme. Second, it is supported more rights, including the downstream devices. Finally, the cost of the chip based on DI-DRM is low. The scale of SOC application scheme is only 1/3 to 1/6 of the existing DTCP.