摘要： 利用双线性映射理论，结合代理签名和盲签名的优点，在基于身份的公钥密码体制中，提出了一种基于身份的代理盲签名方案。该方案采用以身份为基础的公钥，取代了以数字证书为基础的公钥，省略了验证签名时从系统中获取公钥的步骤，减少了交互的次数，节省了存储空间，并克服了李方案中存在的两个安全性缺陷，有效防止了原始签名人冒充代理签名人对消息进行签名，且限制了代理签名人的代理签名权。

关键词: 代理签名, 盲签名, 基于身份, 双线性映射, Weil对

Abstract: Based on theory of weil paring and ID-based cryptography system, a new ID-based proxy blind signature is presented, which satisfies the security properties of both proxy signature scheme and blind signature scheme. The scheme which uses ID-based public key to replace the digital certification public key could effectively omit the process of getting public key from the system and reduce the interaction times and the memory space. Thus, it resolves two issues in Li’s proxy blind signature scheme, which could effectively prevent original signer from forging a valid proxy blind signature for any file and restrict the virtual proxy power of proxy signatory.

Key words: Proxy signature, Blind signature, Identity-based, Bilinear map, Weil paring

中图分类号: 

• TP309