中文摘要：

基于Zhang-Kim环签名方案,本文给出了一种新的基于双线性对的环签名方案,并指出和改进了Zhang-Kim方案的不合理之处.经分析这两种签名方案的安全性和效率,本文提出的环签名方案比Zhang-Kim方案实现速度更快,计算量更小,签名长度更短.环签名在电子商务中具有重要的作用,因而环签名方案的研究具有重要的应用价值.

英文摘要：

Based on Zhang-Kim ring signature scheme, a novel ring signature scheme from bilinear pairings is presented. The irrational part in the Zhang-Kim scheme was pointed out and modified. Through the security and efficiency analysis, it is concluded that the novel ring signature scheme can be realized faster with less computation cost and shorter signature length. Ring signature can be used in constructing e-commerce, so the ring signature research has important value in applications.