在一个exe文件后面加上一个节，并设置密码，运行的时候需要输入密码才可以执行...

RC5算法的C++实现-RC5 algorithm to achieve C

使用openssl库，公钥对数据进行加密的dll库的源代码-Using openssl library, public key data encryption dll library source code

一个JAVA的DES加密程序-a JAVA DES encryption

C++ MD5开发组件-C++ MD5 development component

RC2算法源代码-RC2 algorithm source code

This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.-This program is free software you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

MD5加密算法java实现 * 下面这些S11-S44实际上是一个4*4的矩阵，在原始的C实现中是用#define 实现的， 这里把它们实现成为static final是表示了只读，切能在同一个进程空间内的多个 Instance间共享*/ -MD5 algorithm to achieve java* Below these S11- S44 is a 4* 4 Moment RUF, in a primitive realization of the C# define is achieved, Here they become static final realization of the said CD. cut in the same process space within the shared among many Instance* /

一个用Vc编写的文件加密器，可以加密任何类型的文件，速度很快！-Vc with a paper prepared by the encryption device that can encrypt any type of document, very fast!

循环异或-XOR cycle

基于8位密码，每位密码值范围为5秒，连续三次键入错误报警1秒的开锁提示音；(5)密码设定完毕后有5秒内未进入，自动锁闭。LED输出模块，数码管（