这是RC4加密算法的VB源程序，语法简单。如果您有需要，可以翻译为其他语言的版本。

提供服务端登陆验证程序（验证码随机改变，防止非法进入）； 提供服务器控制程序，管理员可以允许、屏蔽和删除一个注册用户的登陆客户端； 任何改变访问地点的行为，都必须得到管理员的授权，否则无法登陆系统； 即使知道其他用户的密码也不能登陆系统。-provide certification services-landing procedures (Random Verification code change to prevent illegal entry); Provide server control procedures, administrators can allow, shielding and delete a user"s landing client; Any change in location of the visit have to be authorized administrators, whether while not landing systems; even if they know the password for other users can not landing system.

运用 OpenSSL 实现对文件加密-The use of OpenSSL to achieve file encryption

MD5加密算法在当今已经被人们广泛的认识与应用 这里用java实现MD5加密代码-ECC C++

Openssl & ActivePerl-5.8 & 编译要点说明,按照说明很容易通过编译，本人已经测试过，祝你好运。-Openssl ActivePerl- Compiler 5.8 points that can easily follow the instructions through the compiler, I have tested, I wish you the best of luck.

URL编码 如“exit”编码为“％65％78％69％74”-URL encoding, such as

DIAMOND加密算法的原代码-separate encryption algorithm source code

凯撒加密，用java实现 非扩展算法，C=M*K，有加密和解密两步-Caesar encryption, using java to achieve non-expansion algorithm, C = M* K, have a two-step encryption and decryption

BlowFish加密算法.封装过程按照标准的API形式进行-BlowFish encryption algorithm. Packaging process in accordance with the standard form of the API

md5加密酸法实现，VC++6.0实现，希望东家多多下载，交流交流-md5 encryption acid realize, VC++ 6.0 realize the hope that a lot owner to download and exchange exchange

DES 加密系统的 C 语言源代码，实现了简单的DES加密系统。-DES Encryption System C language source code, a simple realization DES encryption system.