【作者】 苏丹；

【导师】 杨宗凯；

【作者基本信息】 华中科技大学 ， 通信与信息系统， 2004， 硕士

【摘要】 随着计算机网络技术和数字信息技术的迅速发展,互联网与人们的生活联系得越来越紧密。在这种情况下,电子商务迅速发展起来。电子支付是电子商务的核心环节和关键步骤,其安全性日益成为人们关注的焦点。离线电子现金支付系统以其匿名性、离线性、独立交易性等特点,成为电子支付系统的首选模型。如何安全地实现网上支付功能,是电子商务深入开展所必须研究的重大课题。目前,国外开发的相关离线电子现金支付系统已经不少,但国内离线电子现金的研究尚处于探索阶段,还没有出现成熟的系统。然而,在实践的基础上加强理论研究是一个必要的过程,因此,开发出一套完整的离线电子现金系统显得至关重要。这不仅是理论研究的需要,也是我国离线电子现金系统广泛应用的必经之路。本文的工作是结合国家自然科学基金重大项目“电子商务安全支付协议的研究”展开的,重点研究如何在不安全的Internet网络上实现一种离线电子现金支付系统的原型系统。文章首先综述了离线电子现金支付系统的研究现状,总结了离线电子现金支付系统的关键理论,然后对本课题提出的一种基于智能卡的离线电子现金协议进行了详细描述,并对其安全性进行了证明。在对系统和协议研究的基础上,用分层的思想提出了离线电子现金支付系统的体系结构,并详细描述了系统的设计与实现流程,最后在实验环境下对系统进行测试。该系统实现了离线电子现金系统的各项基本功能,从实践的角度证明了理论的正确性与可行性,并且为离线电子现金支付系统逐步走向实用做出了贡献。更多还原

【Abstract】 With the rapid development of the computer network technology and digital information technology, Internet has played a vital part in people’s daily life. On this condition, electronic commerce is developing rapidly. E-payment is the core factor and crucial process in electronic commerce and its security has attracted more and more attention of the people. The off-line electronic cash payment system has become the priority in the e-payment system due to its merits of anonymity and off-line. It is very important to deepen development of electronic commerce by implementing the secure payment via Internet.Presently, many systems with regard to the electronic cash payment have been developed. However, researches on electronic cash are in a phase of exploring and no mature system appeared in our country. In other words, it is necessary to enhance the theory research based on practice, so it is of great importance to develop an off-line electronic cash payment system with full functions. It is not only a method for research, but also a requirement to fulfill the extensive application of the off-line electronic cash payment system in our country.The work in this thesis is based on the project of national natural science fund of “Research on the secure payment protocol for electronic commerce”, and focuses on how to implement an off-line electronic cash payment prototype system via the insecure Internet network. First of all, this thesis summarizes the status quo of off-line electronic cash payment system and related important theories, then describes the off-line electronic cash protocol based on smart card proposed in our project and analyzes its security. After researching on the related systems and protocols, this thesis proposes a system structure of the off-line e-cash payment with the thought of stratification, and describes the design and implementation flow of the system. In conclusion, we test our system under the circumstance of experimentation. This system implements all the basic functions of off-line electronic cash payment system, and improves the validity and feasibility of the off-line electronic cash theory from the point of view of practice. Furthermore, it will contribute dramatically to the realization of the off-line electronic cash payment system.更多还原