计算机密码学 经典密码学书籍，含很多算法的标准实现代码-Cryptography book including many standard codes for some cryptographic algorithms. recommended.

内有DES密码系统设计报告，含详细设计过程及全部代码。Delphi编写，可对字符串及文件进行加解密。-There were DES password system design reports, with detailed design process and all of the code. Delphi write, may to the string and file encryption.