this visual basic source code,perhaps usefull 4 you

用Visual Studio 2003编的文件加密程序，能对文件进行二进制读入，再和密码做异或，保存。版本一-Visual Studio 2003 for use of file encryption program, can read a binary file, and then do XOR and password, save. Version 1.0

Base64编解码，纯c语言，解码忽略换行符，可以直接解码邮件源码

本代码实现了维吉尼亚密码，维吉尼亚密码是基于简单的凯撒密码改进而来的多表替换密码，代码简单，供交流学习使用。

VHDL implementation of the twofish cipher for 128,192 and 256 bit keys. The implementation is in library-like form All needed components up to, including the round/key schedule circuits are implemented, giving the flexibility to be combined in different architectures (iterative, rolled out/pipelined etc). Manual in English is included with more details about how to use the components and/or how to optimize some of them. All testbenches are provided (tables, variable key/text, ECB/CBC monte carlo) for 128, 192 and 256 bit key sizes, along with their respective vector files.-VHDL implementation of the twofish cipher for 128,192 and 256 bit keys. The implementation is in library-like form All needed components up to, including the round/key schedule circuits are implemented, giving the flexibility to be combined in different architectures (iterative, rolled out/pipelined etc). Manual in English is included with more details about how to use the components and/or how to optimize some

md5算法，实现给一个512bir数据块加密，程序有详细的注释，-md5 algorithm, to realize a data block encryption 512bir, procedures have detailed notes,

md5加密算法源代码-The source code of MD5 encryption algorithm

c++写的md5加密算法，易于移植 md5加密-c++ to write the md5 encryption algorithm, easy to transplant md5 encryption

今天我们学习了des对称加密算法这是一个des算法的C++实现-This is a des !

C++实现的椭圆曲线算法。已经写成一个库文件只要调用就行了-C++ Realized elliptic curve algorithm. Has been written in a library file as long as the call on the list

这里介绍了利用Microsoft CryptoAPI 实现AES加密的技术要点-Introduce here the use of Microsoft CryptoAPI realize AES encryption techniques