串口软件“加密狗”的设计与制作

＂Soft Dog＂ of Serial Interface Designing and Realization

根据计算机串行通信接口工作的特点，本文提出了设计安装在该接口上的软件“加密狗”的思路，以及实现的途径。文章也对“加密狗”所需的电源等问题，提出了解决方案。

This paper talks about how to design and setup ＂Softdog＂ that base on the feature of computer serial interface. The author also resolve the problem of power supply for the ＂Softdog＂.