RSA算法的原理分析及实现。RSA是既能用于数据加密也能用于数字签名的一种非对称密码体制的算法。它有一对密钥，其中之一是私有密钥，由用户保存；另一个为公开密钥，可对外公开。并用VC++语言实现，通过MFC设计的一个小系统来模拟算法的简单应用-RSA algorithm and the realization of the principle. RSA is the best tool for data encryption can be used for digital signatures, a non-symmetric cryptography algorithms. It has a pair of keys, one of which is the private key, by the user preserved　another for the public key can be made public. And VC++ Language, through the MFC designed a small system to the simple application of simulation algorithm