本例是用md5做为数据校验的算法防止自己的程序被篡改的小例子。有些可执行程序，当被改了资源时再运行会有文件已损坏的提示，这就是使用了数据校验。当然你可以使用个性化的,比如des作为数字签名，那样安全性更高。具体请见代码及注释.-cases is the use of data as md5 checksum algorithm to prevent their own procedures be tampered with small examples. Some of the executa

MD5的具体实现，大致分为以下几步。补位，消息填充，移位，进入四轮循环，输出。代码有详细注释。-MD5 practical implementation, roughly divided into the following a few steps. Fill a, message filled, shift, into the fourth cycle, output. The code is detailed notes.

c语言实现的RSA算法，有详细注释。且调试正常运行。-RSA algorithm c language, there are detailed notes. And debugging normal operation.

遥控器制作所用笔记资料，是一个学习遥控的不可少的资料-Remote control used in the production notes data is a learning remote control of essential information