文件加密的过滤驱动程序，适用于大部分的文件加密软件

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密码serpent算法源代码, 该算法是AES候选算法之一-Password serpent algorithm source code, the algorithm is AES, one of the candidate algorithm

The class has a methode named make_CRC that gets a byte stream and start/end offsets then calculate and return a 16 bit CRC according to determined POLYNAMIAL.The POLYNAMIAL is a private field of the class.

通过对OpenSSL对称密码算法函数的调用，实现常用的对称加密。这个工具主要的功能已经实现，而且还可以对大文件进行加密，可能效率上还需进一步完善，因为对大文件加密时，太差劲的电脑会感觉有点卡！另外，它还可以对电影加密，不妨一试。-Symmetric cryptographic algorithm through OpenSSL function calls to achieve common symmetric encryption. The main function of this tool has been achieved, but also can encrypt large files, you may need to further improve efficiency, because the large file encryption, too bad the computer will be felt Dianka! In addition, it can encrypt the film, worth a try.

很多加密算法的C实现-lot of the encryption algorithm to achieve C

MD5算法之C#程序-MD5 algorithm procedures on C#

文件加密技术的程序-file encryption procedures

打包文件，VB源码，还好，值得学习和使用.-Packing paper, VB source, Fortunately, it is worth learning and use.

一个用C＋＋、JAVA、C#等编写的数字签名代码序列，里面有三种不同语言写的-A use of C , JAVA, C# Such the preparation of the digital signature code sequence, which has three different written languages

elgamal的源程序-ElGamal