关键词: 密码学, 前向安全, 代理盲签名, 安全分析

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