CAJ | 학술논문

电子现金系统是一种非常重要的电子支付方式,如何通过群签名确保电子现金系统的安全、高效支付一直是国内外研究的重点.对已提出的椭圆曲线群签名方案进行改进,解决原方案中存在的一个安全问题,并给出成员撤销算法,最后基于改进后的群签名方案提出一个多银行电子现金系统,该系统能够防止用户篡改电子现金的金额、防止敲诈、洗钱和非法购买,同时可以撤销成员的匿名性并灵活地实现成员撤销.
전자현금계통시일충비상중요적전자지부방식,여하통과군첨명학보전자현금계통적안전、고효지부일직시국내외연구적중점.대이제출적타원곡선군첨명방안진행개진,해결원방안중존재적일개안전문제,병급출성원철소산법,최후기우개진후적군첨명방안제출일개다은행전자현금계통,해계통능구방지용호찬개전자현금적금액、방지고사、세전화비법구매,동시가이철소성원적닉명성병령활지실현성원철소.
Electronic cash system is a very important electronic payment method,and how to ensure the security and efficiency of the e-cash system is a hotspot in this area.In this paper,the authors improve an ECC group signature scheme presented in 2007,solve a security problem and present a new algorithm for group membership revocation.Then,they present an off-line electronic cash system with multiple banks based on improved group signature scheme.This system provides preventing customers from juggling the sum of electronic cash,criminal activities such as blackmailing,money laundering,and illegal purchases.The system also provides revocable anonymity for customers and membership revocation.