计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2009年
21期
4861-4863
,共3页
密码学%门限签名%否认%Chebyshev多项式%信息安全
密碼學%門限籤名%否認%Chebyshev多項式%信息安全
밀마학%문한첨명%부인%Chebyshev다항식%신식안전
cryptography%threshold signature%deny%Chebyshev polynomial%information security
对Wang和Li提出的无可信中心的(t,n)门限签名方案[1]进行了安全性分析,指出该方案的群签名过程中存在一个严重的安全漏洞:即部分原始签名成员在生成密钥时合谋作弊,就能达到事后否认的目的,并对Wang和Li的代理多签名体制进行改进,将Chebyshev多项式与(t,n)门限签名体制相结合,提出了一种新的基于Chebyshev多项式的无可信中心(t,n)门限签名方案.
對Wang和Li提齣的無可信中心的(t,n)門限籤名方案[1]進行瞭安全性分析,指齣該方案的群籤名過程中存在一箇嚴重的安全漏洞:即部分原始籤名成員在生成密鑰時閤謀作弊,就能達到事後否認的目的,併對Wang和Li的代理多籤名體製進行改進,將Chebyshev多項式與(t,n)門限籤名體製相結閤,提齣瞭一種新的基于Chebyshev多項式的無可信中心(t,n)門限籤名方案.
대Wang화Li제출적무가신중심적(t,n)문한첨명방안[1]진행료안전성분석,지출해방안적군첨명과정중존재일개엄중적안전루동:즉부분원시첨명성원재생성밀약시합모작폐,취능체도사후부인적목적,병대Wang화Li적대리다첨명체제진행개진,장Chebyshev다항식여(t,n)문한첨명체제상결합,제출료일충신적기우Chebyshev다항식적무가신중심(t,n)문한첨명방안.
It is pointed out that there is a weakness in the (t, n) Threshold signature scheme without a trusted party proposed by Wang and Li~[1], if several members collude together, they can deny that they had taken part in process of signing some messages with others. Furthermore, Chebyshev polynomial and the (t, n) threshold signature scheme are combined, and a new proxy multi-signature scheme based on Chevbyshev polynomial is proposed.
