面向可管理和可控制的P2P内容存取的DRM系统

Controllable DRM system for P2P content access

为了在P2P网络环境下保护数字化音视频内容,提出和实现了一个新的服务于广播电视系统影视资料分发与交换的DRM系统(PCADRM).PCADRM以适用于P2P应用环境的智能节点重叠网络为架构,将权限证书与媒体资源文件分开存储,通过PKI的双向身份认证提供混合模式的权限代理实现对媒体资源文件的访问控制,通过基于视频水印提取和验证的行为监测进行盗版追踪实现事后控制.在PCADRM的实践中证明,所提出的带有智能节点重叠网络的系统架构和采用的数字版权技术,实现了对P2P内容存取的管理和控制.

The wide application of P2P （peer-to-peer） file sharing brings series of problems, such as security, piracy and intellectual property. A P2P-based DRM（digital rights management） system （PCADRM） which is used for distributing and exchanging the materials in broadcasting and television system is proposed. It can protect the digital audio and video contents in the P2P network environment. Firstly, in PCADRM（P2P content access-oriented DRM） the overlay network with intelligent nodes is constructed which provides a suitable platform for P2P applications. Secondly, the rights certificates and media resource files are stored separately. PKI （public key infrastructure）-based bi-directional identity authentication is provided in PCADRM. The rights agent with distributed-centralized structure can achieve access control of media resource files. The extraction and verification of video watermark are used for traitor tracing. The architecture for overlay network with intelligent nodes and DRM technology applied in PCADRM are proved to be effective for realizing the management and control of contents access in P2P network.