北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (3): 23-26.doi: 10.13190/jbupt.200703.23.yuy

• 论文 • 上一篇    下一篇

一个有效的代理环签名方案

禹勇   

  1. 西安电子科技大学ISN国家重点实验室
  • 收稿日期:2006-07-06 修回日期:2006-10-25 出版日期:2007-06-30 发布日期:2007-06-30
  • 通讯作者: 禹勇

An Efficient Proxy Ring Signature Scheme

YU Yong1, YANG Bo2, LI Fa-gen1, ZHANG Ming-wu2   

  1. 1. National Key Lab. of ISN, Xidian University, Xi’an, 710071,China;
    2. College of information, South China Agricultural University, Guangzhou, 510642, China
  • Received:2006-07-06 Revised:2006-10-25 Online:2007-06-30 Published:2007-06-30
  • Contact: YU Yong

摘要:

摘要: 针对现有的代理环签名方案计算效率低的问题,基于Chow最近提出的基于身份的环签名,提出了一个有效的代理环签名方案。提出的方案能够防止原始签名人生成一个有效的代理环签名,从而保护了代理签名人的权益。在随机预言机模型下利用环签名分叉引理证明了所提方案的强不可伪造性依赖于CDH问题。在提出的方案中,代理环签名的计算不需要配对运算,签名验证只需要两个配对运算,与现有的方案相比,提出的方案具有更高的计算效率。

关键词: 双线性对, 代理签名, 环签名, 匿名性

Abstract:

Abstract: The existing proxy ring signature schemes share the disadvantage of low efficiency in computation. An efficient proxy ring signature from bilinear pairing is proposed, which is obtained from Chow’s recently proposed identity-based ring signature. Furthermore, the proposed scheme can prevent the original signer from generating a valid proxy ring signature, thus the profits of the proxy signer are guaranteed. Strong unforgebility of the proposed scheme is proven to rely on CDH problem using forking lemma for ring signature under random oracle model. No pairing operation is required for the generation of a proxy ring signature and only two pairing operations are required for the verification. Compared with the existing schemes, the proposed scheme is more efficient.

Key words: bilinear pairings, proxy signature, ring signature, ambiguity

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