ID-based Ring Signature and Proxy Ring Signature Schemes from Bilinear Pairings

Details ID-based Ring Signature and Proxy Ring Signature Schemes from Bilinear Pairings ID-based Ring Signature and Proxy Ring Signature Schemes from Bilinear Pairings

2005-04-23

arxiv.org/abs/cs/0504097v1

Computer Science

Cryptography and Security

Published with ePrint Archive

Scientific paper

In 2001, Rivest et al. firstly introduced the concept of ring signatures. A ring signature is a simplified group signature without any manager. It protects the anonymity of a signer. The first scheme proposed by Rivest et al. was based on RSA cryptosystem and certificate based public key setting. The first ring signature scheme based on DLP was proposed by Abe, Ohkubo, and Suzuki. Their scheme is also based on the general certificate-based public key setting too. In 2002, Zhang and Kim proposed a new ID-based ring signature scheme using pairings. Later Lin and Wu proposed a more efficient ID-based ring signature scheme. Both these schemes have some inconsistency in computational aspect. In this paper we propose a new ID-based ring signature scheme and a proxy ring signature scheme. Both the schemes are more efficient than existing one. These schemes also take care of the inconsistencies in above two schemes.

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