对共享验证门限代理签密方案的改进  

Analysis and improvement on threshold proxy signcryption scheme with shared verification

作　　者：邢星[1] 谢琪[1,2] 

机构地区：[1]杭州师范大学理学院,杭州310036 [2]杭州师范大学研究生学院,杭州310036

出　　处：《计算机工程与应用》2008年第33期89-92,共4页Computer Engineering and Applications

基　　金：国家自然科学基金No.10671051;浙江省自然科学基金No.Y105067~~

摘　　要：指出了王等的具有共享验证的门限代理签密方案存在两个安全性缺陷,一是该方案并不满足共享验证这一特性,二是代理组可修改授权证书。进一步,给出了改进方案,克服了原方案的缺陷。Two attacks on Wang et al.＇s threshold proxy signcryption scheme with shared verification show that their scheme are insecure.The one is that their scheme does not has the property of shared verification;the other is that their scheme cannot resist the attack of revising the warrant.Further,a modification to their threshold proxy signcryption scheme can satisfy the security requirement.

关 键 词：门限代理签密 共享验证 验证签密 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]