Off-line And Anonymity-revoking Electronic Payment System

With the Internet spread widely and rapidly in recent years, Electronic Commerce with the advantage of high-efficency and low lost becomes the rising manageing modle step by step. In the process of trade in the open Internet, how to ensure the security of the data transfers and how to maintain the fairness are the most important factors, which determine wether or not the electronic commerce gets popularity. Therefor secure and efficient electronic payment system is significant for electronic commerce. This dissertation just based on above to expand in many fields. The main works of this dissertation are as follows: 1. The present situation of the electronic payment system and the developing trend are deeply analyzed after reading a lot of related scientific resource. Then, the author illuminates the significance and aim of this dissertation. 2. Firstly, the concept, classification and main used techniques of the electronic payment system are presented. Then, lots of related off-line and anonymity-revoking electronic payment systems based on discrete logrithm are deeply analyzed. 3. The dissertation proposes a new off-line and anonymity-revocable electronic payment system based on analyzing Yangbo's scheme, and increases the security and efficency of the electronic payment system. 4. The dissertation constructs zero-knowledge proof and Brands'restrictive blind signature based on elliptic curve cryptosystem, and then applies these schems to electronic payment system based on elliptic curve cryptosystem. 5. The dissertation constructs a new off-line and anonymity-revocable electronic payment system based on elliptic curve cryptosystem after researching other systems based on discrete logrithm problem. 6. The author implements an off-line and anonymity-revocable electronic payment system based on discrete logrithm problem in Vc++6.0 developing environment. In the model of electronic payment system, four types of parties are involved, five possible transactions may occur between them.