The article introduced the characteristics of Enhanced Parallel Port of the computer and gave a design of the hardware encrypt card based on EPP.
介绍了计算机增强型并行口epp协议的基本特点，给出了基于EPP协议的硬件加密卡的一种设计方案。
In addition, the communication with MCU and computer is realized by the serial communication port. The system's hardware schematics and software flow chart are also discussed in this paper.
此外，还利用单片机的串行通信模块，设计了与计算机通信的串行接口，并给出了系统的硬件电路图和软件流程图。
The hardware part is simple enough and USES com and LPT port of the computer.
硬件部分很简单，并使用COM和并口端口的电脑。
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