无证书聚合签名方案的分析与改进  

Cryptanalysis and Improvement of Certificateless Aggregate Signature Scheme

作　　者：徐明明[1] 尹毅峰[1] 张晴 刘扬[1] 王佳星 XU Mingming;YIN Yifeng;ZHANG Qing;LIU Yang;WANG Jiaxing(College of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China;Henan Mechanical and Electrical Vocational College, Zhengzhou 451191, China)

机构地区：[1]郑州轻工业学院计算机与通信工程学院,郑州450001 [2]河南机电职业学院,郑州451191

出　　处：《湖北民族学院学报（自然科学版）》2017年第2期190-194,共5页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：国家自然科学基金项目(61272038;61572445)

摘　　要：聚合签名技术在资源受限的场景下有很好的应用,是数字签名研究中的热点.对最近提出的一个无证书聚合签名方案进行安全性分析,指出方案不能抵抗伪造性攻击.提出改进的的无证书聚合签名方案,在随机预言模型和Computational Diffie-Hellman(CDH)困难假设下,证明了改进的方案的不可伪造性,效率分析对比表明,改进的方案更安全高效.Aggregate signature technology has a good application in resource-constrained scenarios and is a hotspot in digital signature research. The security of the certificateless aggregate signature scheme proposed by Du et al is analyzed,and we find that the scheme can not resist the forgery attack.Based on the Du scheme,an improved scheme of certificateless aggregate signature is proposed.Under the assumption of stochastic prediction model and Computational Diffie-Hellman（ CDH） problem,the unforgeability of the improved scheme is proved,and the efficiency analysis shows that the improved scheme is safer and more efficient.

关 键 词：无证书密码体制 聚合签名 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]