一种自可信的匿名公平电子支付协议

摘要

In allusion to trust problem in electronic commerce among the customer, the merchant and the third party, we proposed a simple and highly-efficient self-trusted anonymous fair-exchange e-payment protocol in this paper. The protocol was based on Brands off-line electronic cash scheme and concurrent signature. The protocol involved no trusted third party, but could provided a fair commerce environment and made both the customer and the merchant got what to want in time. The analysies and experiment show the protocol satisfied the properties of security, customer-anonymity, accountability, fair-exchange and atomicity besides self-trust, and had fine performance. The protocol has resolved the trouble problems on conspiracy and efficiency in e-commerce. It was suitable for the transaction of large-size items.%针对电子商务中客户、商家和第三方的信任问题,在Brands离线电子货币方案基础上,利用同时生效签名生效的同时性,设计了一种简单、高效的自可信匿名公平电子支付协议.协议无可信第三方,但也可保证交易双方公平交换,并能及时地让交易双方各得所需.分析和实验表明,协议在满足自可信性同时,还满足安全性、客户匿名性、可追究性、公平性和原子性,并具有很高运行效率,解决了一直困扰电子商务安全中的共谋和效率问题,对数据量大的商品的交易具有很好适应性.