Abstract: In this paper, according to the benefit of the original signer and the signer, by using partially blind signature, the proxy signature scheme is improved. And it also proposes a new proxy signature scheme with finite warrant period. The storage of the system database is reduced, and the efficiency of search and execution are achieved as opposite to the other proposed schemes.

Key words: Blind proxy signature; Partial blind signature; Finite warrant period

摘要： 综合考虑了原始签名人和代理签名人的利益，通过将部分盲签名技术引入代理签名，对文献[3]提出的一种匿名代理签名方案进行了改进，构造出在合理安全假设可证安全的新匿名代理协议。其特点在授权证书中包含授权有效期，与以往方案相比，减少了系统数据库的存储量，提高了系统检索和执行效率。

关键词: 盲代理签名；部分盲签名；授权有效期