标准模型下的代理多重签名的安全性  

Study of security of proxy multi-signature under standard model

作　　者：范训礼[1,2] 贾永库[1] 

机构地区：[1]西北大学信息科学与技术学院,陕西西安710069 [2]西北工业大学电子信息学院,陕西西安710072

出　　处：《西北大学学报（自然科学版）》2009年第2期215-219,共5页Journal of Northwest University（Natural Science Edition）

基　　金：博士后基金资助项目(20070410381);陕西省教育厅专项基金资助项目(08JK447);西北大学校内基金资助项目(2005N35)

摘　　要：目的研究标准模型下代理多重签名的安全性问题。方法基于Waters签名,拓展了代理签名模型,并利用双线性对提出了标准模型下的代理多重签名模型。结果根据攻击者可以获得有助于进行攻击资源的多少,把其分为两种类型并给出了相应的形式化定义。随后给出了标准模型下的代理多重签名算法,对标准模型下的代理多重签名的安全性进行了分析和数学证明。结论在计算性Diffie-Hellman问题困难的假设前提条件下,标准模型下的代理多重签名是安全的。Aim To study the security of a proxy multi-signature under the standard model. Methods Based on Waters signature, expanding the proxy signature model first prompted by X. Hoang. Furthermore it studied the security model of proxy multi-signature and prompting the proxy multi-signature under the standard model using bilinear-pair. Results The paper divided the attackers were divided into two types according to the resources that they can obtain and attack. The formulary definitions for them were presented respectively. Finally the proxy multi-signature algorithm under the standard model was elaborated and its security was also analyzed and examined to be mathematically secure. Conclusion On the assumption it is difficult to compute the Diffie-HeUman problem, the security of the proxy multi-signature under the standard model is proved.

关 键 词：标准模型 代理多重签名 安全模型 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]