以前用delphi+kol写的监视工具，可以制定禁止某些程序的运行，如一些游戏的关键字。可通过网络升级数据库，也就是说在服务端一次更新关键字数据库，所有终端电脑同时更新。包内含有client和server的代码。-previously wrote Da surveillance tools could be developed to prohibit the operation of certain procedures, such as the keyword game. Through th

The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.Though the cipher is easy to understand and implement, f