前向安全代理盲签名方案的分析与改进  

Analysis and Improvement of Forward Secure Proxy Blind Signature Scheme

作　　者：刘二根[1] 王霞[1] 

机构地区：[1]华东交通大学理学院,江西南昌330013

出　　处：《华东交通大学学报》2015年第6期110-114,共5页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(11361024;11261019;61472138;61263032);江西省高校科技落地计划项目(KJLD12067);华东交通大学校立科研基金项目(11JC04);江西省科技厅科技项目(20151BDH80071)

摘　　要：通过对Manoj等人提出的前向安全的代理盲签名方案进行安全性分析,发现该方案在代理授权和代理盲签名阶段存在攻击伪造问题。由此提出了改进的前向安全的基于离散对数的代理盲签名方案。新方案在代理授权阶段将单向散列函数嵌入到短签名中,并改进了签名阶段,克服了原方案的缺陷。在效率上,只比原方案多一次哈希运算,但具有更高的安全性,新方案满足可验证性、可区分性、不可伪造性、不可否认性等性质。Through the security analysis of the forward secure proxy blind signature scheme proposed by Manoj et al., this study found out that the scheme can not resist the forgery attack during proxy phase and signature generation phase. In order to avoid these attacks, an improved forward secure proxy blind signature scheme was presented based on DLP. The improved scheme overcame the drawbacks in the original scheme by embedding oneway hash function in short signature during proxy phase and improving signature generation phase. In the efficiency, the improved scheme was more secure with one more hash operation compared with the original scheme,which has verifiability, distinguishability, unforgeability, nonrepudiation, etc.

关 键 词：代理盲签名 前向安全 不可伪造性 代理密钥 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]