新型通用格式多媒体数字版权管理系统设计与实现

针对多媒体内容的版权保护问题，设计一种新型通用格式多媒体数字版权管理模型，包括内容加密与打包、密钥管理、安全引擎、许可证管理与分发、DRM客户端和DRM管理等功能单元，该模型通过非结构化加密方法，克服了基于内容格式加密方法的局限性，实现对通用格式多媒体内容的保护。另外，采用许可证提取码作为下载许可证的凭证，解决许可证重新发行和转让的问题，并支持细粒度使用控制方式。基于此模型，实现了基于固定与移动融合业务的多媒体数字版权管理系统，并将其运用于数字消费领域，实验结果和实际运行表明该方案不影响多媒体质量，效率及安全性较高，在多媒体内容版权保护方面具有较好的实用性。

Design and implementation of a novel general formatmultimedia digital rights management system

Aiming at the copyright protection of multimedia content, a novel general format multimedia digital rights management model was designed which includes encryption and packaging of content, key management, security engine, license management and distribution, DRM client, DRM management and other functional units. This model uses unstructured encryption method which overcomes the limitations of encryption method based on the content format to support the general format multimedia. In addition, this model uses the license acquisition number as the only certificate to download license to solve the problem of license reissue and transfer, and supports fine-grained control model. Combined with this model, a multimedia digital rights management system was developed based on fixed and mobile converged services which is used in the field of digital consumer. The experimental results and practical application show that this scheme with good practice in the copyright protection of multimedia content does not affect the multimedia quality, and have high efficiency and safety.