| The present economical situation in China asks the enterprises to change the traditional transaction style and implement e-business. The most important problems the e-business is facing are: the information confidentiality, the data availability, the data integrity, the user's identity, the non-repudiation of the data's original sender and the legal user, etc.;Key words: Electronic Commerce, Secure Electronic Transaction protocol, Secure Sockets Layer, electronic payment system, message security;The subject of this thesis analyzes the basic concepts, the security infrastructure and payment system of electronic commerce, makes a thorough and comprehensive research on the security technology, authentication and transaction process, points out some deficiencies in Secure Electronic Transaction (SET) protocol. Then an improved method is given out with the data flow and data structure, finally a secure electronic commerce payment system and its software based on the improved SET model are designed. This thesis brings forward the improved method for improving the speed of transaction, and strengthening the security of protocol and adapting it to any circumstance easily. |
