用C编写的利用DES、DESX，DES3（DES）加密算法，这…

一个用3DES加密文件的小测试程序！-a document using 3DES encryption small test program!

c51-----des --- 可以完成加密解密等功能，测试通过没问题-c51----- des------ to be completed, such as encryption and decryption functions, the test No problem! ! !

What Does the code DO? Sometimes we may desire to hide our file contents from others.One of the possible way is encrypting these files.Here a simple encryption technique is used(In VB - The same technique can be implemented in "c" also.) Program flow Explained * Open the File to be encrypted for Binary Access Read(Say Source File) * Open a temparory file where encrypted data is stored for Binary Access Write(Say Destination File) * Loop through the Source File Byte by Byte * For each byte read from the file, Complement the data. (Using Not operator (in C we have to use "~" operator) * Write Complemented Data to Destination File * Delete the Source File * Rename Destination file as Source File(Now Encryption is over) -What Does the code DO? Sometimes we may desire to hide our file contents from others.One of the possible way is encrypting these files.Here a simple encryption technique is used (In VB- The same technique can be implemented in

NTL 大数运算库 专门RSA等加密算法运算库-Large numbers operator NTL library dedicated RSA encryption algorithm such as library operations

md5源程序文件2-md5 source files 2

本软件设计一共分为两个模块：打包加密模块和发行模块。Ø  打包加密模块：实现视频文件的打包加密，音频文件的打包，CPL文件生成，PKL文件生成和创建一个本地资产映射文件MAP.asmap(管理有关影片及密钥相关信息用于发行)。Ø  发行模块：读取MAP.asmap中内容，根据encrypt一项判断视频是否加密。若加密根据MAP.asmap中相关内容和要发行的机器证书文件生成KDM文件和ASSETMAP，若未加密则只生成ASSETMAP文件。

Skipjack 加密算法 美国国家安全局标准加密算法-Skipjack encryption algorithm US country peaceful overall situation standard encryption algorithm

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。

这个是三重DES算法源代码(C语言版本) -This is the Triple DES algorithm source code (C language version)

一个RSA算法的完整实现，有超长密钥-an RSA algorithm integrity, and it is extra-long keys