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讲述des加密过程，实现了简易锝des加密算法(About the des encryption process to achieve a simple encryption algorithm technetium des)

使用MD5算法对数据和文件进行加密，信息安全(Using the MD5 algorithm to encrypt the data and documents, information security)

这是一个小程序,凯撒解密,自己写的,以后还会扩展的(This is a simple program for a example of ceasar cipher. It is produced by myself and I want to extend it to a substitution cipher program in some days.)

说明：  使用维吉尼亚密码进行控制台编程，实现对英文文本文件的加解密！(Virginia password using the console program, to achieve the English version of the document encryption and decryption!)

检测CRC编码 看CRC编码在传输后是否有错误 有变动 (Detection CRC codes to see whether the CRC coding errors in the transmission there is a change)

自己写的一份RSA算法。可正常执行。控制台程序。(Write your own copy of the RSA algorithm. Can be performed normally. Console program.)

加密文件夹,十分好用 使用visual basic环境编程(lock file)

通过MATLAB的编程，实现对图片的加密，奇异值的分解，离散变化，程序简单，明了。(Through MATLAB programming, realize the image encryption, singular value decomposition and discrete changes, procedure is simple, clear.)

使用dll，将vc下进行文件加解密的blowfish方法做成dll文件，从而在vc中调用，隐藏加解密的参变量。(Using dll, under the vc the blowfish file encryption method made dll file, so call in vc, the hidden variable encryption and decryption of the parameters.)

快速取模指数算法，C++编写，下载即可编译运行，RSA算法里面需要用到的(Take the fast modular exponentiation algorithm, C++ to prepare, you can compile and run the download, the RSA algorithm which need)