A DRM Switchable System with Embedded Device Implementation

• Main Authors: Chiao-Lin Wu, 吳巧琳
• Other Authors: Hsueh-Ming Hang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/67169376043380599275

碩士 === 國立交通大學 === 電子工程系所 === 95 === Digital Rights Management (DRM) is a concept for controlling the distribution and consumption of digital media. As embedded multimedia devices are becoming popular, there are strong demands for the light-weight DRM systems that can run smoothly in a resource-limited environment. Because implementing the DRM in the embedded device becomes a trend, many companies create their private DRM on their device. However, this phenomenon causes the problem of interoperability between different DRM systems. In addition, from the consumer viewpoint, users can not use all kinds of DRM system on the same device. This is inconvenient for users. In this thesis, we propose a switchable DRM system to achieve the usage of different DRM systems on the same device. Before we design a switchable DRM system, we must understand the feature of the platform and analyze the structure of some DRM systems. After understanding them, we find an optimum integration of the platform and one DRM system. Then, we based on the designed DRM system to propose the concept of the DRM switchable design. We design an universal DRM module loader. This loader checks the validity of a loadable DRM module, and it defers all the other DRM tasks to the loaded module. This system integrates the concept of downloadable tools and the OMA architecture to provide a balance between flexibility and complexity. We also implement the mechanism on an embedded evaluation board to demonstrate its feasibility.