使用sap abap4 编写的 编码/解码程序。-* It is encryption/decription library written in ABAP/4 using well** known Blowfish encryption algorithm

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