RBAC '99 Proceedings of the fourth ACM workshop on Role-based access control
SIGUCCS '99 Proceedings of the 27th annual ACM SIGUCCS conference on User services: Mile high expectations
Escrow services and incentives in peer-to-peer networks
Proceedings of the 3rd ACM conference on Electronic Commerce
Digital rights management and watermarking of multimedia content for m-commerce applications
IEEE Communications Magazine
Study of digital license search for intellectual property rights of S/W source code
ICCSA'07 Proceedings of the 2007 international conference on Computational science and its applications - Volume Part III
License protection with a tamper-resistant token
WISA'04 Proceedings of the 5th international conference on Information Security Applications
ESORICS'06 Proceedings of the 11th European conference on Research in Computer Security
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Most real-life systems delegate responsibilities to different authorities. We apply this idea of delegation to a digital rights management system, to achieve high flexibility without jeopardizing the security. In our model, a hierarchy of authorities issues certificates that are linked by cryptographic means. This linkage establishes a chain of control, identity-attribute-rights, and allows flexible rights control over content. Typical security objectives, such as identification, authentication, authorization and access control can be realized. Content keys are personalized to detect illegal super distribution. We describe a working prototype, which we develop using standard techniques, such as standard certificates, XML and so forth. We present experimental results to evaluate the scalability of the system. A formal analysis demonstrates that our design is able to detect a form of illegal super distribution.