des加密算法的c程序实现，能够加密8位明文，经测试通过编译。-des encryption algorithm c Program to express encryption eight, the test compiler.

由于上课需要编写的Playfair加密程序，能够实现Playfair加密功能，通过了VS2015编译。所用资源和加密速度不同。-Since the class need to write Playfair encryption program, enabling Playfair encryption through the VS2015 compiler. And the resources used to encrypt different speeds.

AES加密代码，C++编译器。只有三个文件夹(Encryption program AES encryption code, C++ compiler. There are only three folders AES encryption code, C++ compiler. There are only three folders)