Architecture for secure multimedia with DRM over real-time body and home networks

In the context of ubiquitous and pervasive computing environments, there have been considerable efforts to have audiovisual systems and applications converge, especially in home environments where homes can be considered as spaces of convergence, and for nomadic users with advanced mobile devices as points of convergence. The network of excellence INTERMEDIA seeks to progress beyond home and device-centric convergence towards truly user-centric convergence of multimedia, having as its long term vision "The User as the Multimedia Central", i.e. the user as the point at which services (multimedia applications) and the means for interacting with them (devices and interfaces) converge, (see following figure for the depiction of this vision). One of the biggest challenges that we have to face in the deployment of architectures in such environments is related to, on the one hand, with the security and protection of digital contents that interchanged between users of such architectures and on the other hand with the provision to the users with security mechanisms that allow them to perform secure transactions (e.g. authentication, privacy protection, secure data transfer, etc.) in those environments. Moreover intellectual property protection is a mandatory request in modern multimedia environments like the ones that are going to be deployed in the Intermedia context. Today the end-users are equipped with different types of small devices that allow them to be the digital contents creators, thus creating digital content that wish to share with third parties. In most cases, the end-users would like to have mechanisms which would give them the possibility to protect the content which have created and possibly to set their own usage rights over it, thus specifying towards third users how their digital content shall be used. Thus, it is a requirement to integrate DRM solutions in services and applications that target delivery of protected content that resides into the home network of the user. Considering the technical problems (system weaknesses) that result from add-on security solutions to independently developed network services, the approach of our effort to develop architectures with security and DRM as inherent requirements will lead to secure solutions that will increase the trust placed by content providers on the system and thus, it will lead to wider availability of services to a larger population. In the framework of this deliverable work has been done in the assessment of the specifications of a DRM architecture comprising all the required constituents (DRM server, License server, DRM client) in compliance with the MPEG-21 standard and utilizing TPM primitives. Furthermore, the detailed description of a prototype that implements the specified architecture is provided.