基于椭圆曲线的不可否认门限代理签名方案  

Nonrepudiable Threshold Proxy Signature Scheme Based on Elliptic Curve Cryptography

作　　者：袁丁[1] 范平志[1] 

机构地区：[1]西南交通大学移动通信研究所

出　　处：《西南交通大学学报》2007年第1期8-12,共5页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(60470303);四川省科技厅科技攻关项目(05GG007-008);四川省科技厅应用基础研究项目(04JY029-051-1);四川省教育厅重点课题基金资助项目(2003A085)

摘　　要：针对已有的门限代理签名方案不能有效地抵抗签名人协作攻击和伪造攻击,以及在某些场合实用性不强的缺点提出了改进方案.在代理签名生成阶段要求每个实际签名人提供自己的私钥信息,在形成的代理签名中不仅包含每个代理签名人的秘密信息,还包含了每个实际签名人的秘密信息,从而能有效抵抗协作攻击和伪造攻击.另外,用椭圆曲线密码机制替换了已有的方案中用的ElGamal离散对数密钥机制,使系统效率更高.An improved threshold proxy signature scheme was proposed to overcome the defects of the existing scheme that it can not resist conspiracy attacks and forgery attacks from the signers, and is not practical in some applications. In the signing process, every actual signer is required to put in his private key, which makes the signature contain secret information of both proxy signers and actual singers and resist conspiracy attacks and forgery attacks from the signers. An elliptic curve cryptography was used to replace ElGamal discrete logarithm cryptography in the original scheme, which makes the new scheme efficient.

关 键 词：门限代理签名 方案 椭圆曲线 协作攻击 伪造攻击 安全性 效率 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]