一种存在特权集的门限群代理多重签名方案  

Threshold Group-proxy Multi-signature Schemes Based on Privilege Subsets

作　　者：陈道伟[1] 施荣华[1] 樊翔宇[1] 

机构地区：[1]中南大学信息科学与工程学院,长沙410075

出　　处：《小型微型计算机系统》2012年第11期2514-2517,共4页Journal of Chinese Computer Systems

基　　金：国家大学生创新性实验计划基金项目(LA10004)资助

摘　　要：针对陈伟东提出的一类存在特权集的门限群签名方案,最近有文献相继指出该类方案存在严重的安全问题,并针对其主要存在的不能抵御内部成员的合谋攻击,不能抵抗可信密钥认证中心发起的伪造攻击,签名不具有可追踪性等安全隐患提出了改进方案.本文结合他们的安全性分析和存在特权集的门限群签名方案,依据schnorr秘密分享原理,提出一种适用于多个特权集的门限群代理多重签名方案,实现了不同集合用户具有不同权限的代理授权和代理签名,增强了门限群代理签名方案的安全性和可靠性.并且着重对该方案进行了安全性分析,指出在离散对数假设的前提下,该方案是安全的.Chen Wei-Dong proposed a scheme which was called ＂A Group of Threshold Group-Signature Schemes with Privilege Subsets＂.Recent literature has pointed out that the scheme has serious security problems,and aimed at its main existing can＇t resist internal members of the conspiracy attack,could not resist a trusted key authentication center initiated the forgery attack,signature has not traceability safety problems such as the improvement scheme was put forward.Combined with threshold group signature schemes with privilege subsets.This paper proposes a new kind of threshold group-proxy multi-signature schemes which is used for multiple privilege subsets based on Schnorr secret-sharing principle.It realize the different members of a different set of permission proxy authorized and proxy signature,And enhance the security and reliability of the threshold group-proxy signature scheme.It analyzes the security of this scheme emphatically,points out that this scheme is safe in discrete logarithm assumption premise.

关 键 词：特权集 门限群代理 SCHNORR签名 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]