高效可证安全的无证书代理签名方案的安全性分析  

Cryptanalysis of Efficient Certificateless Proxy Signature Scheme with Provable Security

作　　者：黄梅娟[1] 杜红珍[1] 

机构地区：[1]宝鸡文理学院数学系,宝鸡721013

出　　处：《计算机与数字工程》2015年第8期1454-1457,1470,共5页Computer & Digital Engineering

基　　金：国家自然科学基础研究计划项目(编号:61402015);陕西省教育厅科学研究基金(编号:12JK1003)资助

摘　　要：对于S-H.Seo等提出的无证书代理签名方案进行了密码分析,给出了一个有效的伪造攻击算法,指出此方案不能抵抗第二种类型敌手的攻击,敌手Ⅱ可以伪造任意消息的合法代理签名。最后分析了此方案遭受攻击的主要原因,并给出了相应的改进措施。Recently, S-H. Seo et al proposed a certificateless signature scheme and used it to construct a certificateless proxy signature with provable security. They demonstrated that their schemes are provable security in the random oracle model under the computational Diffie-Hellman assumption. Unfortunately, by given concrete attack, the paper demonstrated that their schemes were not secure against the Type Ⅱ adversary. A Type Ⅱ adversary could forge a legal proxy signature of any message. The paper analyzed the root cause of attack and gave some suggestions for modifications in the end.

关 键 词：代理签名 无证书签名 伪造攻击 双线性映射 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]