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Phần 1 đã thảo luận các yêu cầu an ninh nói chung rất quan trọng cho tất cả các loại dịch vụ thông tin, bao gồm cả các dịch vụ thương mại điện tử. Phần 2 có một cái nhìn sâu hơn về các yêu cầu bảo mật bổ sung cụ thể cho các hệ thống thanh toán điện tử. | Part 2 Electronic Payment Security Part 1 discussed the general security requirements that are important to all kinds of information services including e-commerce services. Part 2 takes a closer look at the additional security requirements that are specific to electronic payment systems. It describes the electronic payment systems that provide a secure way to exchange monetary value between customers and businesses and focuses on the principles of payment security techniques rather than on giving a complete overview of payment systems. 65 4 Electronic Payment Systems Before designing a security policy it is necessary to know the system to be secured and the risks it may be exposed to. This chapter gives an introduction to electronic commerce and electronic payment systems as well as an overview of the payment instruments. Finally it discusses the major issues of electronic payment security. 4.1 Electronic Commerce Electronic commerce or e-commerce can be defined as any transaction involving some exchange of value over a communication network 1 . This broad definition includes Business-to-business transactions such as EDI electronic data interchange Customer-to-business transactions such as online shops on the Web Customer-to-customer transactions such as transfer of value between electronic wallets Customers businesses-to-public administration transactions such as filing of electronic tax returns. .
