【摘要】 提出一种基于椭圆曲线的离线电子支付方案,对S.Brands提出的利用Smart卡的电子支付系统进行了改进,提出了一种可撤销用户匿名性的支付系统。它能有效地保护用户的隐私,又能在银行的协助下,一个可信第三方(委托人)可撤销用户的匿名性,因此可有效地防止钱的伪造、贪污、洗黑钱和敲诈勒索等犯罪活动。由于该方案基于椭圆曲线离散对数加密体制,使其更适于Smart卡和具有更高的加密强度。更多还原

【Abstract】 This paper proposes a off-line electroni c payment scheme based on the elliptic curve cryptosystem. A payment system by Smart card proposed by S.Brands is improved,and an anonymity-revoking electronic payment system is presented.On the one hand, customer’s privacy can be compromised by the bank or by the payee .On the other hand,the anonymity can be removed by a trusted third party with the help of bank.In this case,the third party can link a payment with corresponding withdrawal and prevent money forgery,laundering,badger game and black mailing. The scheme is suitable for application in Smart card because of using elliptic curve cryptosystem.更多还原