Cryptology ePrint Archive: Report 2004/206

ID-Based Proxy Signature Using Bilinear Pairings

Jing Xu and Zhenfeng Zhang and Dengguo Feng

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 schemes with provable security have 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.

Category / Keywords: ID-based signatures, proxy signatures,bilinear pairings,provable security.

Date: received 20 Aug 2004, last revised 22 Aug 2004

Contact author: xujing at is iscas ac cn

Available format(s): PDF | BibTeX Citation

Version: 20040823:024029 (All versions of this report)

Short URL: ia.cr/2004/206

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