基于智能卡的含有效期的电子现金系统  

E-cash System with Validity Duration Based on Smart Card

作　　者：刘文远[1] 郭丽芳[1] 王宝文[1] 王亚东[2] 

机构地区：[1]燕山大学信息科学与工程学院,秦皇岛066004 [2]哈尔滨工业大学计算机科学与技术学院,哈尔滨150001

出　　处：《计算机工程》2008年第17期133-135,共3页Computer Engineering

基　　金：国家电子信息发展基金及河北省信息产业发展计划基金资助项目(2005035025);国家科技部高新技术计划基金资助项目(2005EJ000017);河北省自然科学基金资助项目(F2005000368)

摘　　要：为防止银行数据库记录的无限膨胀,提高系统的执行效率,该文将有效期加入基于智能卡的电子现金系统中,提出基于智能卡的含有效期的离线电子现金系统。该系统采用基于椭圆曲线的数字签名技术来实现。智能卡由于容量有限,椭圆曲线需要较小长度的密钥就可以获得较高的安全性,相对离散对数,椭圆曲线更适合应用于基于智能卡的电子现金系统中。因为该系统基于椭圆曲线离散对数表示问题,所以其安全性也是基于椭圆曲线离散对数的安全性。In order to prevent the database of the bank expanding infinitely and improve the performance efficiency of the system, this paper proposes an off-line e-cash system with validity duration based on the smart card by adding the validity duration into electronic cash system. The system applies the signature based on the elliptic curve to realize. As the capability of the smart card is limited, and the elliptic curve can achieve much better security and only need much shorter keys, the elliptic curve is much more adapt to e-cash system based on smart card than the discrete logarithm. The system is based on expression question of elliptic curve dispersed number, so its security is based on the security of elliptic curve dispersed logarithm.

关 键 词：智能卡 有效期 椭圆曲线 盲签名 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]