基于身份的代理盲签名技术研究

Research on ID-based Proxy Blind Signature

代理盲签名技术综合了代理签名和盲签名两种签名技术的特点,即原始签名人能将其数字签名权利委托给代理签名人,且消息的内容对签名者不可见,但可信第三方却成为其签名系统的薄弱环节。针对此问题,构造一种基于身份的代理盲签名方案,验证其不可伪造性、盲性和不可链接性,并将方法实际应用于公安刑事侦查系统中,理论和实践证明了方法的安全性和有效性。

Proxy blind signature technology is the combination of proxy signature and blind signature,which allows the original signer to authorize proxy signers but keeps the privacy of messages from signers.However,it seriously depends on the trusted third party and will fail when the trusted third party is forged or attracted.This paper presents an ID-based proxy blind signature scheme,verifies its properties of unforgettable ability,blindness and unlink ability,and further applies the method into criminal investigation in the public security system.The security and effectiveness are proved both theoretically and practically.