若干部分盲签名方案的密码学分析和改进  

Cryptanalysis and improvement of some partially blind signature schemes

作　　者：胡小明[1] 王见[1] 杨寅春[1] 

机构地区：[1]上海第二工业大学计算机与信息学院,上海201209

出　　处：《计算机工程与设计》2012年第10期3757-3761,3766,共6页Computer Engineering and Design

基　　金：国家自然科学基金项目(61103213);上海市教育委员会科研创新基金项目(10YZ201);上海高校选拔培养优秀青年教师科研专项基金项目(RYQ309002)

摘　　要：对最近提出的若干部分盲签名方案进行了安全分析,指出这些方案不像宣称的那样是安全的,存在签名请求者非法篡改事先协商好的公共信息的攻击,并对出现这种篡改攻击的原因进行了分析。分别对这些存在安全缺陷的方案进行了改进,并对改进方案的正确性、安全性和有效性进行了分析。分析表明,改进的方案在不降低原方案效率的情况下是安全的。Some partially blind signature schemes proposed recently are analyzed, and points out that these schemes are not se- cure as they claimed, and there exists an attack that a requester can change illegally pre-agree common information, and the rea- son why these schemes suffer from the attack is analyzed. Then, some improvement is proposed to overcome the security draw- back of these schemes respectively, and correctness, security and efficiency of these improved schemes are analyzed. The analy- sis shows that these improved schemes are secure without decreasing efficiency of original schemes.

关 键 词：盲签名 部分盲签名 无证书签名 安全分析 双线性对 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]