对一个高效的基于证书签名方案的分析和改进  

Analysis and Improvement of an Efficient Certificate-Based Signature Scheme

作　　者：周华静 刘二根[1] 左黎明[1,2] 

机构地区：[1]华东交通大学理学院,江西南昌330013 [2]华东交通大学系统工程与密码学研究所,江西南昌330013

出　　处：《安庆师范学院学报（自然科学版）》2016年第1期47-51,共5页Journal of Anqing Teachers College(Natural Science Edition)

基　　金：国家自然科学基金(11361024;11261019);江西省高校科技落地计划(KJLD12067);江西省教育厅科研项目(GJJ13339);华东交通大学校立科研基金(11JC04)

摘　　要：在发现第一类攻击者容易攻破一个高效的基于证书签名方案后,对原方案进行改进,并在逆Diffie-Hellman和计算Diffie-Hellman困难性假设下,利用随机预言机模型证明了改进方案在适应性选择消息和身份下具有不可伪造性。同时,将改进后方案的效率,与已有基于证书签名方案效率相比,发现该方案是高效的。From the study of an efficient certificate-based signature we find that the first adversaries can attack the scheme easily. As a consequence,we propose an improved scheme on the basis of original scheme,and prove that the scheme is existentially unforgeable against adaptive chosen message and identity attacks under random oracle model based on the inverse Diffie-Hellman Problem and Compute Diffie-Hellman assumption. In this paper we also analyze the efficiency of the scheme,compare with the existing schemes,find that this scheme is effective.

关 键 词：公钥密码学 数字签名 基于证书 随机预言机模型 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]