C语言实现的DES代码，可以直接编译运行。加密10M文件时间大约16到20秒。注释详细。其中工程名AES是手误打错了，实际上是DES算法的实现代码。-C language implementation of the DES code can be directly compiled to run. 10M file encryption for about 16-20 seconds. Detailed notes. Which works were wrong hands AES is wrong, in fact, DES algorithm implementation code.