DES加密算法的实现和演示，具体算法见网上，程序中有注释-DES encryption algorithm and demonstrate the achievement of the specific algorithm see online, proceedings have Notes

Net框架由于拥有CLR提供的丰富库支持，只需很少的代码即可实现先前使用C等旧式语言很难实现的加密算法。本类实现一些常用机密算法，供参考。-Net framework, as they own CLR provides support for the rich, with little code can be used to achieve the old language, such as C is very difficult to achieve encryption algorithm. Realize some of the categories used confidential algorithm for information.

c++的基于openssl实现的简单aes文件加密类 -c++ realize openssl based on a simple type of file encryption aes

VIP account is provide a way to those who do not want upload code to download

用vc++实现aes算法，对分组密码学做深入深入祥彻的研究 。-Using vc++ implementation aes algorithm, on the block cipher Xiang-depth study in depth to do thorough research.

数字水印技术的基本概念-A survey of Digital watermarking technique. It may an overview about watermarking.

MD5算法的verilog实现，同时包含有testbench。-Verilog of MD5 algorithm is realized, includes testbench at the same time .

快速去除PDF密码设置，不用安装，直接使用-Quick removal of PDF password settings, do not need to install, direct use

bmp图像的加密-bmp image encryption

按照分组密码运行的CBC方式，将其中的DES算法置换为S-DES，分组长度为8BIT，初始矢量V1分别设置为00H,FFH,及任意8BIT无符号整数，实现该加密/解密模型-running CBC, which will be the replacement for the DES algorithm S-DES, a length of 8BIT initial vector V1 were set to 00H, FFH, and the arbitrary 8BIT unsigned integers, the achievement of this encryption/decryption model