门限代理签名方案的安全性分析  

Analysis of security in threshold proxy signature scheme

作　　者：祁传达[1] 李亚梅[1] 金晨辉[2] 

机构地区：[1]信阳师范学院数学与信息科学学院,河南信阳464000 [2]解放军信息工程大学电子技术学院,河南郑州450004

出　　处：《计算机工程与设计》2006年第10期1767-1768,共2页Computer Engineering and Design

基　　金：河南省杰出青年科学基金(0312001800)

摘　　要：在Sun提出的门限代理签名方案的基础上,Yang、Tzeng和Hwang等人于2003年提出了一个在算法和通信方面都更有效的门限代理签名方案(简称YTH方案)。对YTH方案进行了安全性分析,指出该方案容易受到内部攻击,即原始签名者在代理签名组不知情的情况下,可以伪造一个由任意个代理签名者参与的对任何消息的代理签名。由于原始签名者能够绕过代理签名组伪造代理签名,所以该签名方案不符合数字签名所必须满足的不可伪造性和不可否认性原则。Based on Sun＇s threshold proxy signature scheme, Yang C Y, Tzeng S F, Hwang M S and et al presented a new threshold proxy signature scheme in 2003, which is more efficient both in algorithm and communication. The new scheme is henceforth called YTH-scheme. The security of YTH-scheme was analyzed. The result of the analysis showed that YTH-scheme is vulnerable to insider attacks, which means a malicious original signer can forge a proxy signature on any information made by any t of proxy signers together without noticed by the group of proxy signers. Because of this, YTH-scheme cannot meet the needs of digital signature, such as unforgeable and undeniable.

关 键 词：数字签名 多重签名 代理签名 门限代理签名 安全性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]