UC安全的自认证盲签密协议  

Self-Certified Blind Signcryption Protocol with UC Security

作　　者：李建民[1] 俞惠芳[1] 赵晨[1] LI Jianmin;YU Huifang;ZHAO Chen(School of Computer, Qinghai Normal University, Xining 810008, China)

机构地区：[1]青海师范大学计算机学院,西宁810008

出　　处：《计算机科学与探索》2017年第6期932-940,共9页Journal of Frontiers of Computer Science and Technology

基　　金：国家自然科学基金No.61363080;青海省应用基础研究项目No.2016-ZJ-776~~

摘　　要：自认证盲签密(self-certified blind signcryption,SCBSC)协议能够同时实现公钥加密和盲签名,并且当发送方与接收方对签名存在争议时,任何第三方都能验证签名的有效性。然而,现有的自认证盲签密协议还不具有UC(universally composable)安全性,针对这个问题,引入UC安全框架,利用该框架可以模块化分析与设计自认证盲签密协议。定义了自认证盲签密协议在UC安全框架下对应的理想函数;证明了在适应性敌手模型下,自认证盲签密协议实现该理想函数,当且仅当签密协议满足不可区分适应性选择密文攻击(indistinguishability against adaptive chosen-ciphertext attacks,IND-CCA2)。Self-certified blind signcryption(SCBSC)protocol can simultaneously fulfill public key encryption and blind signature.When disputation occurs between the sender and recipient,any third party can verify the validity of the signature.However,the existing self-certified blind signcryption protocol does not yet have universally composable(UC)security.Aiming at this problem,the UC security framework is introduced.The use of this framework can analyze and design self-certified blind signcryption protocol in modularity.Firstly,the ideal function of self-certified blind signcryption protocol is defined under the UC security framework;secondly,under the adaptive adversary model,self-certified blind signcryption protocol may achieve functionality,if and only if self-certified blind signcryption protocol satisfies the indistinguishability against adaptive chosen-ciphertext attacks(IND-CCA2)

关 键 词：自认证盲签密 UC安全性 理想函数 适应性选择密文攻击 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]