Feng-Yuan不可否认门限代理签名方案的改进  

Improvement of Feng-Yuan nonrepudiable threshold proxy signature scheme

作　　者：谢琪[1] 

机构地区：[1]杭州师范学院信息工程学院,浙江杭州310036

出　　处：《计算机应用》2006年第7期1634-1636,共3页journal of Computer Applications

基　　金：浙江省自然科学基金资助项目(Y105067);浙江省教育厅科技计划项目(0561XP49)

摘　　要：Feng-Yuan指出Hsu等的门限代理签名方案不具有不可否认性,同时给出了具有不可否认性的改进方案。指出Feng-Yuan的改进方案无法抵抗内部成员的合谋攻击,从而无法实现可识别性和不可否认性。进一步,给出了改进方案以弥补该方案的安全性缺陷。Feng-Yuan pointed out that Hsu et al.＇s threshold proxy signature scheme lacks of undeniability, and proposed an improvement scheme with nonrepudiation. A conspiracy attack on Feng-Yuan＇s improvement scheme shows that their scheme suffered from forgeability, unidentifiability and deniability. Furthermore, an improved scheme was presented to remedy the security weakness of Feng-Yuan＇s scheme.

关 键 词：代理签名 门限代理签名 合谋攻击 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]