标准模型下基于身份的环签名方案

摘要

In this paper,we propose an identity-based ring signature scheme based on Waters dual system encryption technology and the orthogonality property of composite order bilinear group operation.The scheme,relying on two simple static assumptions,is fully secure in the standard model.Due to the merit of Hierarchical identity-based encryption (HIBE),the proposed ring signature scheme achieves unconditional anonymity and has much higher computational efficiency.%本文利用Waters提出的对偶系统加密技术,结合合数阶群上双线性运算的正交性,提出了一个基于身份的环签名方案.该方案在标准模型下是完全安全的,其安全性依赖于两个简单的静态假设.该方案借助分级身份加密(Hierarchical Identity-Based Encryption,HIBE)的思想,使得环签名满足无条件匿名性且具有较高的计算效率.