理解对称加密算法的原理，熟悉常用的对称加密算法：DES,TripleDES,Blowfish 以DES加密算法为例，掌握分组加密算法加，解密过程的实现。 -Understand the principles of symmetric encryption algorithm, familiar with the commonly used symmetric encryption algorithms: DES, TripleDES, Blowfish DES encryption

用Visual Basic 6开发工具，完成BlowFish加密/解密算法的源代码(An implimention of BlowFish encipher and decipher)