强不可伪造的代理多签名方案  

Strong unforgeability of proxy multi-signature

作　　者：刘幼萍[1] 吴铤[1] 王辉[1] 

机构地区：[1]杭州电子科技大学计算机学院,杭州310018

出　　处：《计算机应用》2012年第A01期68-70,共3页journal of Computer Applications

摘　　要：对Liu等提出的标准模型下的代理多签名方案(LIU ZHENGHUA,HU YUPU,MA HUA.Secure proxymulti-signature scheme in the standard model[C]//Proceedings of ProvSec2008,LNCS 5324,Berlin:Springer-verlag,2008:127-140)进行了安全性分析和改进。通过研究Liu方案的不可伪造性,证明了其只是弱不可伪造,并提出了对它的一个改进方案,同时给出了详细的安全性证明。该改进方案克服了Liu方案中存在的安全性缺陷,是一个具有强不可伪造性的代理多签名方案,安全性更强。Liu＇s proxy multi-signature scheme in the standard model（ LIU ZHENGHUA, HU YUPU, MA HUA. Secure proxy multi-signature scheme in the standard model[ C]// Proceedings of ProvSee2008, LNCS 5324, Berlin： Springer-Verlag, 2008：127 - 140） was safety analyzed and improved in this paper. By studying the unforgeability of Liu＇s scheme, this paper proved that it＇s only weakly uaforgeable. To overcome the security problem in Liu＇s scheme, a modified scheme was proposed and detailed safety certification is also given. The modified scheme is proved to be strongly unforgeable, which has higher security.

关 键 词：代理多签名 标准模型 弱不可伪造性 强不可伪造性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]