The Research And Design Of A Payment Gateway Based On SET

The security payment gateway is the hinge between the bank and the internet, is the most inportant part of the E-Commerce. At present, most of the payment gateway are executed based on the SSL protocol, cause the simpleness and the convenient of the SSL protocol. But the shortcoming of the SSL protocol is that the secret-key of the encrpytion is not long enouth , and the sensitive imformation is exposive on the server of the web. So, we say that the payment gateway based on the SSL protocol is not security enough.The security payment gateway based on the SET protocol uses the secret-key encrpytion, numeric idiogragh and the numeric certification, which provide the enough security. The security payment gateway becomes the security barrier between the Internet and the finance net. At the same time, the payment gateway transforms the protocol between them, and does the communication. So, we provide the payment on-line.Researching and designing the payment gateway based on the SET, we must know the physical and logistic position of the payment gateway in the E-commerce system, and the function of it. SET is the protocol that based on the message-flow, this paper analyse the message-flow and the data-flow of the SET payment, design the data-frame and message-collection of the security payment gateway based on the SET protocol, and the encrytion realization.We make the detailed analysis and design about the message-flow of the payment gateway based on the SET, in succession, advance the prototype system of the payment gateway, realize the security-payment based on the SET.