创建一个经过加密的软件系统信息文件，在软件启动时会校验这些信息，判断是授权用户在使用该软件。...

采用CAST-256位加密的Back Orifice 2000插件源代码-using CAST-256 encryption Back Orifice 2000 plug-in source code

vb写的rsa加密算法-vb wrote rsa encryption algorithm

论Java加密技术与Windows的结合-On Java encryption technology and the integration of Windows

基于RSA的数字签名实现，用VC++模拟实现RSA数字签名过程。-RSA-based digital signature implementation, using VC++ simulation of the process of realization of RSA digital signature.

StreamSec Security Library含有多种算法的控件-StreamSec Security Library contains a variety of control algorithms

简单的 密码问题 初学者-simple passwords for beginners

1.本程序将所有可能出现的英文和符号定义在ASCII表中的“000--255”中的256个常用字符 2.在实现2的基础上，实现控制台对英文文本文件（注意明文和密文都以文件形式存在）的加解密 形式：cipher 源文件名 目的文件名 密钥 E/D（标示加解密）说明：对于加密来说，源文件名就是明文，对于解密来说，源文件名就是密文-1. This program will all possible symbols in English and in the definition of the ASCII table, "000-- 2 55 "of 256 commonly used characters in two. in achieving two on the basis of Console achieve the English text files (and expressly close attention to the text of a document form) encryption forms : cipher source document file names Key E/D (marked increase declassified) Note : For encryption, source file name is expressly for declassification, the source file name is ciphertext

rsa算法实现的经典开发包，对学习加密算法帮助很大-rsa algorithm realize the classic development kit, the encryption algorithm learning very helpful

用vb实现的文本加密算法-used to achieve the text encryption algorithm

KEELOQ_ENcode　简单的加密程序，可惜就是没有源代码。-KEELOQ_ENcode simple encryption program, but is not the source code.