this visual basic source code,perhaps usefull 4 you

MD5 加密算法 Delphi 源码。 编译为dll文件，方便其他语言的系统调用-MD5 encryption algorithm Delphi source. Dll file to compile and facilitate language system calls

IBE基于身份的加密系统的加密程序，使用VC6.0开发-IBE identity-based encryption system of the decryption process, using VC6.0 Development

文件加密技术一例给文件加密的技术很多,其中又分为不同等级,以适合不同场合的需要.这里给出最简单的文件加密技术,即采用文件逐字节与密码异或方式对 文件进行加密,当解密时,只需再运行一遍加密程序即可.-file encryption technology to the case file encryption technologies lot, which will be divided into different levels, to suit the needs of different occasions. Here is the most simple file encryption technology, which adopts a case-by-byte file with the password or different ways to document encryption, decryption, only re-running again encryption procedures.

delphi版本的各种加密方式 DES AES MD5 BASE64 SHA，有各种例子

本次实现采用流水线结构，分析子密钥与原始密钥的直接关系，利用组合逻辑同时产生16个子密钥，总体上既兼顾了效率，又不占用太多资源，经仿真测试，完全通过。

md5加密函数，自己的pass更加安全可靠-md5 encryption function, their pass more secure

DES加密类，可以自定义key，可以更改IP置换表-DES encryption type, you can customize the key, you can change the IP permutation table

Delphi加密控件源码，包括对称钥匙加密控件和散列函数控件 -Delphi encryption controls the source code, controls including the symmetrical key encryption and disperses the row letter numerical control

RSA加密的聊天源代码-chat RSA encryption source code

汇编加密文件一例。-compilation of case file encryption.