一种改进的加密算法射频卡读写系统设计

An Improved Encryption Algorithm for RF Card Read and Write System Design

该文以嵌入式系统芯片为主控制器,实现读卡器数据读写与算法的优化升级。重点介绍MF-RC500射频卡读写系统的硬件与软件的整体设计。硬件上,研究分析了系统硬件的工作原理、设计方法,通过计算确定硬件最佳阻抗大小,绘制读卡器电气接线图;软件上,完成了主控程序的优化升级设计,利用cast5算法,对数据进行加密。本文介绍的射频卡读写系统,拥有容错处理、键盘操作中断相关函数、上位机软件。利用不同模式间的相互转化使系统功耗降低,程序运行速度得到优化。实验证明,本文设计的系统稳定可行,有较强可移植性。可适用于考勤系统、自动售水系统、公交车收费系统等。

This article is to study how to use the embedded system chip as the main controller, to achieve the card reader read and write data and optimize the algorithm.In the RF card read and write system, the article focuses on MF-RC500 RF card reader system hardware and software design.On the hardware, this article analyzed the working principle and design method of the system hardware, determined the optimal impedance of the hardware by calculation and edited electrical wiring diagram of the card reader.On the Software, this article designed the optimization and upgrading of the master program, and compiled the read program.This article describes the RF card read and write system which is based on the original read and write system.Use the cast5 algorithm to encrypt the data.The system add fault-tolerant processing, add the keyboard operation interrupt related functions, join the host computer control operation software driver.The system uses low power mode to optimize the program speed and reduce system power consumption.Experiments show that the system designed in this paper is stable and feasible, with strong portability.Can be applied to the attendance system, automatic water sales system, bus charging system.