一种无证书签密方案的安全性分析及改进  

Security Analysis and Improvement of a Certificateless Signcryption Scheme

作　　者：樊爱京[1] 

机构地区：[1]平顶山学院网络计算中心,河南平顶山467002

出　　处：《信阳师范学院学报（自然科学版）》2012年第4期551-554,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河南省科技计划重点项目(102102210416)

摘　　要：利用无证书密码体制的安全模型,分析了一种无证书数字签密方案,发现其存在安全性缺陷.针对这些安全性缺陷,对原方案进行了改进.分析结果表明,该方案具有安全保密性、不可伪造性、不可否认性,改进的方案是有效安全的.A kind of certificateless digital signcryption scheme was analyzed by using the certificateless cryptosystern security model, and the security flaws were found. Furlhermore, the improved scheme was proposed to eradicate the security flaws. The analysis results show that the improved scheme is characterized by its confidentiality,unforge- ability, nonrepudiation, which implies that the improved scheme is safe and effective.

关 键 词：无证书签密 双线性对 机密性 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]