DES完整地展示在下编译通过的程序环节。

This a good program to start with signal processing in matlab.This gives you basic idea about covolution algorithm.

简单加密工具原程序-simple encryption tools original program

简单的加密源程序-simple encryption source

测试对字符串的MD4。运行环境：vs2008 （注意选择“多字符”编译）-Testing of the string MD4. Operating environment: vs2008 (attention to the selection " multi-character" compilation)

PGP 是一种混合密码系统。当用户使用PGP 来对纯文字加密的时候， PGP 首先会压缩这 段纯文字。数据压缩能够节省调制解调器传输时间以及磁盘类空间，还有更重要的、强化密码法的 保密程度。-PGP is a hybrid cryptosystem. When the user to use PGP to encrypt the text, PGP will first this text compression. Data compression can save time and modem transmission disk space, and more importantly, to strengthen the password confidentiality law.

在这个程序中将实现三种古典加密方法：恺撒算法，多表代换算法中的Vigener算法，与列换位算法-in this process will achieve three classical encryption methods : Caesar algorithm, multi-table substitution algorithm of Vigener algorithms, and algorithm out transpositions

base64加密 -base64 encrypted base64 encryption

这是我上信息安全课做的作业，des的加密算法。-This is my lesson to do on information security operations, des encryption algorithm.

文件加密的过滤驱动程序，适用于大部分的文件加密软件-File Encryption filter driver, applies to most of the file encryption software

软件有限次加密，对软件的使用次数进行限制-finite encryption software, software usage restrictions