不使用双线性对的无证书代理环签名方案

摘要

By analyzing the existing proxy ring signature schemes, we found that most of these schemes used costly pairings. To resolve the problem, we propose a certificateless proxy ring signature scheme without pair- ings. The scheme avoids key - escrow in ID - based cryptosystem, eliminates certificate - existence in certificate -based cryptosystem, realizes signer -ambiguity and proxy signer- ambiguity. Moreover, the scheme has cost- less computation, high security, and no using pairings. It is more convenient to use.%对已有代理环签名方案进行分析,发现这些方案中大多都使用了昂贵的双线性对。为了解决这个问题,基于离散对数和无证书的优点,提出了一种不使用双线性对的无证书代理环签名方案。避免了基于身份密码体制中的密钥托管问题和基于证书密码体制中的证书存在问题,实现了原始签名人和代理签名人的完全匿名性。整个方案没有使用双线性对,计算成本低,安全性能好,实用性强。