Use of MPEG-21 for License Protection and Key Management in DRM Systems

This work proposes a solution to the problem of the secure management and distribution of licenses and keys associated to protected resources. We have identified different use cases to illustrate the requirements of a DRM system including download, super distribution, streaming and groups or domains of users and/or devices of a user. The different mechanisms that we propose are based in MPEG-21 standard. These mechanisms enable the secure distribution of the protected content, licenses and keys, for the different scenarios analysed. Moreover, the solutions provided support joint and separate distribution of content, licenses and keys.