Abstract: The valid signer may take the consequences caused by the disclosure of the private signature key，and the loss will be invaluable.To solve this problem，forward secure scheme has been suggested.This paper proposes a new forward secure proxy blind signature scheme on the basis of the concept of forward security and proxy blind signature.In the new scheme，even if an adversary has gotten the current proxy signature key in a time，it could not forge proxy signature pertaining to the past，that is，previous generated proxy signatures retain valid.Finally，this paper analyzes the correctness and security of the scheme.

Key words: cryptography, forward security, proxy blind signature, security analysis

摘要： 密钥泄露问题对数字签名系统带来的后果是系统的崩溃，具有前向安全特性的数字签名体制就是针对密钥泄露问题提出的。基于前向安全性思想和代理盲签名理论，提出了一种新的具有前向安全性的代理盲签名方案。在该方案中，即使某一时刻代理签名者的密钥泄露，以前时段所产生的代理盲签名依然有效。对所提方案的正确性和安全性做了分析与讨论。

关键词: 密码学, 前向安全, 代理盲签名, 安全分析