ID-Based proxy signature using bilinear pairings

  • Authors:
  • Jing Xu;Zhenfeng Zhang;Dengguo Feng

  • Affiliations:
  • State Key Laboratory of Information Security, P.R. China;Graduate School of Chinese Academy of Sciences, Beijing, P.R. China;Institute of Software, Chinese Academy of Sciences, Beijing, P.R. China

  • Venue:
  • ISPA'05 Proceedings of the 2005 international conference on Parallel and Distributed Processing and Applications
  • Year:
  • 2005

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Abstract

Identity-based (ID-based) public key cryptosystem can be a good alternative for certificate-based public key setting, especially when efficient key management and moderate security are required. A proxy signature scheme permits an entity to delegate its signing rights to another entity. But to date, no ID-based proxy signature scheme with provable security has been proposed. In this paper, we formalize a notion of security for ID-based proxy signature schemes and propose a scheme based on the bilinear pairings. We show that the security of our scheme is tightly related to the computational Diffie-Hellman assumption in the random oracle model.