Based On Fair Exchange Protocol Of E-commerce Platform

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.