一种基于身份的代理盲签名方案的分析与改进  

Cryptanalysis and improvement of ID-based proxy blind signature scheme

作　　者：农强[1] 吴顺祥[2] 

机构地区：[1]漳州师范学院计算机科学与工程系,福建漳州363000 [2]厦门大学自动化系,厦门361005

出　　处：《计算机应用》2008年第8期1940-1942,共3页journal of Computer Applications

基　　金：国家"十一五"科技支撑计划项目(2007BAK34B04);国家自然科学基金资助项目(60704042);厦门大学985二期信息创新平台项目(2004-2007)

摘　　要：通过对Li-Zhang基于双线性映射的基于身份的代理盲签名方案的分析,指出该方案并不满足不可伪造性,原始签名人可以伪造一个有效的代理盲签名,代理签名人可以滥用代理签名权,同时当签名被用户泄露后,代理签名人能将自己在签名协议中的签名和签名的消息联系起来,这就是所谓的可追踪性。在此基础上提出了改进的代理盲签名方案,改进后的方案有效克服了原方案的安全缺陷,并满足代理盲签名所需要的各种安全性要求,其计算量虽有少量增加,但仍低于其他同类方案。The security of the Li-Zhang＇s ID-based proxy blind signature scheme from bilinear pairings was analyzed, and it was found that this scheme did not possess the unforgeability property. The original signer can forge a valid proxy blind signature for any message, and the proxy signer can misuse the signing capabilities. At the same time, the proxy signer can make a linkage between a signature and the corresponding message of signing protocol after signing, which is called linkability. An improved proxy blind signature scheme was proposed, which can resolve the security problems existing in the original scheme and satisfy other required properties of a proxy blind signature scheme. The calculative complexity is lower than that of the other schemes despite a little increase.

关 键 词：基于身份 代理盲签名 不可伪造性 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]