一种前向安全的无证书代理盲签名方案

Forward secure certificateless proxy blind signature scheme

为了解决密钥泄漏问题,提出一种前向安全的无证书代理盲签名方案,采用密钥不断更新的方法,保证了代理盲签名方案的前向安全性。当代理签名者的代理密钥泄漏后,以前所产生的代理盲签名依然有效,从而减少了密钥泄漏对系统带来的损失。同时该方案采用了无证书公钥密码体制,避免了基于证书密码系统的证书管理问题,解决了基于身份的密钥托管问题。

In order to solve the key exposure problem,a forward secure certificateless proxy blind signature scheme is proposed.This new scheme is forward secure by updating secret key frequently.When the proxy signature secret key is stolen, the former proxy blind signature still is available.And then it can reduce the loss,which is caused by the key exposure to a great extent.Based on certificateless public cryptosystem,it also overcames the problem of the certificate management in the certificate-based public key cryptosystem and the inherent key escrow problem in the identity-based public key cryptosystem.