부산대학교 도서관

The system proposed in this paper is smartcard terminal that interfaces with a smartphone device, rather than a computer. In attempt to make point of sale (POS) systems more accessible, the customer needs to have a pre-paid value loaded on their card before they can make a purchase. To authenticate a purchase the user will need to present their card and enter personal PIN and the amount will be deducted from the total they have loaded on their card when a payment is made. The data in the system is secured using a software implementation of 3DES which had an 8-bit variable limitation to control memory usage.