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A decentralized authorization scheme for DRM in P2P file-sharing systems

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3 Author(s)
Qin Qiu ; Institute of Computer Science and Technology, Peking University, Beijing, China ; Zhi Tang ; Yinyan Yu

To enable secure content trade between peers with good scalability and efficiency in Peer-to-Peer (P2P) file-sharing systems, we propose a decentralized authorization scheme for Digital Rights Management (DRM). Based on proxy re-encryption mechanism, our scheme deploys authorization functions on semi-trusted authorization proxy peers who re-encrypt the ciphertext of content keys and issue licenses to content user peers. A trusted server ensures that content users are properly charged for authorization. Our scheme has no alteration to the structure of P2P network and can be implemented with a wide range of proxy re-encryption algorithms. Compared with authorization schemes in existing DRM solutions, our scheme relieves the server from intense authorization processing, and achieves reliable decentralized authorization with good scalability and efficiency.

Published in:

2011 IEEE Consumer Communications and Networking Conference (CCNC)

Date of Conference:

9-12 Jan. 2011