获取本机网卡的MAC地址，通过RSA加密程序计算注册码；反过来通过注册码计算网卡MAC地址进行比较。-Get the MAC address of the machine card, registration code calculated by RSA encryption in turn, calculated through the network card MAC address registration key compare.

C++代码实现对一段文字实现加密解密，而且运用了相关VB的知识，对项目进行了界面设计。-C++ code implements the encryption and decryption of the paragraph of text, but also the use of the VB knowledge about interface design project.

四种加密算法之RSA源代码-C++ （包含一个头文件和一个cpp文件）-Four encryption algorithm RSA source code-C++ (including a header file and a cpp file)