The Secure Payment System Based On PKI Paymentsec

The Secure Payment System called PKI PaymentSec is based on the framework of PKI(Public Key Infrastructure),and refers to some criterions, for example, the advanced protocol of SET 1.0/2.0 which is Security Electronic Transaction,ASN.1 which is Abstract Syntax Notation and so on.The system is composed of five parts. The first part designs the whole framework of the system including system running environment and operation flow criterion.The second is a communication layer.It is responsible for the connection of the communication and the transfer of the information including the messages referring to payment protocol and those referring to no payment protocol between the systems in this structure .It provides the interfaces to application layer and payment protocol layer. Some interfaces are used to transfer the messages referring to no payment protocol.The others are used to transfer the messages referring to payment protocol.The third is responsible for providing the interfaces of PKI and packaging the data.It implements the encryption and decryption of payment protocol layer.It implements the digital signature and supports the operations of certification.It is responsible for encoding and decoding the information from the payment protocol layer.It pertains to the defition of payment protocol criterion.But it does not depend on the payment protocol layer completely in order to extend the functions of the system.The fourth is the payment protocol layer referring to SET criterion and its theory.The basis of the payment protocol layer is a subset of SET criterion according to the facts in our country.The last part designs payment gateway ,payment server and electron wallet in detail according to the design of commnunication interface layer,PKI interfaces and payment protocol layer.It describes the complete flow of payment.