基于公平交换协议的电子商务平台的研究与实现

【作者】 王蕾；

【导师】 耿技；

【作者基本信息】 电子科技大学 ， 软件工程， 2007， 硕士

【摘要】 随着因特网的高速发展,个人计算机的普及和人们对高速快捷的商业行为的要求,电子商务在世界范围内得到了较大的发展,一些传统的商业行为正在逐渐被电子商务所取代。在电子商务获得较大发展的同时,电子商务过程中数字商品交易的安全问题也变得十分突出。在电子商务环境中,数字商品很容易被非法复制和传播,这严重妨碍了电子商务的发展。因此,如何在开放的网络环境下保护数字商品信息的安全性,确保电子交易的公平性己成为人们共同关心的重要研究课题。本文旨在研究一个基于公平交易协议的电子商务平台。本文在研究电子商务的信息安全问题以及安全应用技术基础上,针对数字商品电子交易过程中的安全性和公平性问题进行探讨,研究了自动执行协议、类自动执行协议、在线第三方协议和离线第三方协议这四类公平交易协议;在离线可信第三方的基础上,结合对相关公平交换协议的分析,提出了一个离线可信第三方的乐观公平交易协议。最后还研究了如何将离线可信第三方的乐观公平交易协议应用到电子商务系统中的问题,设计了一种电子商务平台,解决了电子商务系统中的数字商品的信息安全和公平交易这两方面的问题。本文所提出的具有基于离线可信第三方乐观公平交换机构的公平交易协议,保证了交易过程中的公平性。该协议还具有通信量小,可信第三方只需要离线工作,且可信第三方得不到交易双方的秘密等特点。较以往的公平交易方案,降低了网络的物理要求,大大减少了对网络带宽的占有率,系统各方面均表现出良好的效果。更多还原

【Abstract】 With the rapid development of Internet, popularization of personal computer and the needs for the high speed commerce of the people, electronic commerce has greatly developed within the range of world and traditional commerce is gradually replaced by electronic commerce. As electronic commerce has rapidly developed, security of electronic transaction of digital commodity is becoming more and more important. Under the environment of Internet-based electronic commerce, digital commodity are easily copied and distributed illegally which greatly disturbs the development of electronic commerce. Thus, how to protect the security of digital commodity information and assure the fairness of the electronic transaction has become the common serious problem concerned. This paper aims at researching on a electronic commerce platform based on fair exchange protocol.Firstly, the paper analyzes the security of electronic commerce and the security technique, Secondly, this paper aims at the security and fairness issues in the process of electronic commerce of digital commodity, introduces such fair exchange protocols as self-enforcing protocol, Approximately Self-enforcing Protocol, on-line third party protocol and off-line third party protocol, and brings forward a optimistic fair exchange protocol with a trusted third party based on off-line third party. Finally, the paper research on the problem of how to apply fair exchange protocol to system of electronic commerce, and design a electronic commerce platform , The platform solves the information security for digital commodity and fair exchange on Internet.The optimistic fair exchange protocol with off-line trusted third party is presented in the paper, which is assured the fairness during the transaction, has the characteristics of less communicated loads, the trusted third party only needed to work off-line, the third party can not obtained the deal secret and so on. The fair exchange protocol applied in the platform is better than the old protocols, it can request less to the network, reduce the network bandwidth share, bring out good effects in each relative aspects.更多还原