Abstract: A new multi-proxy signature scheme with a self-certified public key cryptosystem is proposed in this paper, which is based on the elliptic curve cryptology. The new scheme combines the proxy signature with the secret sharing theory, which solves the problem of very collectiveness of the proxy signers’ power. It introduces a new self-certified public key cryptosystem, namely, CA needs not to certify every user’s public key, it can resist forgery attack and public-key substitute attack. The proxy group’s secret key is cooperatively generated by all the proxy signers, communication is reduced and safety is improved in the new scheme.

Key words: proxy signature, secret sharing, multi-proxy signature, elliptic curve

摘要： 基于椭圆曲线密码体制提出一个新的自认证公钥多重代理签名方案。新方案将代理签名和秘密分享思想相结合，解决代理签名者权利过分集中的问题。引入一个新的自认证公钥体制，不需要可信中心CA认证用户的公钥，能防止恶意用户的伪造攻击和公钥替换攻击，并且代理签名群私钥由全体代理者合作产生，整个方案通信量小、安全性高。

关键词: 代理签名, 秘密分享, 多重代理签名, 椭圆曲线

CLC Number: 

• TP309