A Simple and Highly Secure Protocol for POS Terminal

As we know, the communication networks were first designed for voice communication purposes. Further developments within the communication networks made it possible to send or transmit data as well. When the public network is used as a bearer for data which need high security, e.g. payment, shopping, police telecommunication or mobile betting, there is a possibility that an attacker might capture the message context which includes user privacy, or amend the message causing a fraudulent transaction. This paper presents an efficient POINT OF SALE protocol for insecure marketplace environments over telephone line or another communication medium. The proposed protocol not only satisfies the convenience and ease of use but also provides high level transaction security and non repudiation characterizes that is necessary for payments.