The protocol"HTTP " which is usedinperusalof the Web sight has, the most basic user identification system.

Whenit tries to accessthe Webpage whereaccess is restricted,it calculatesuser name and the input of the password with the Web browser,whenit agreestothe user which permits access with the server, it can peruse the page.

This time, user name and the passwordbecauseraw when encoding and hash conversion have not been done(the cleartextand the plaintext) with sending and receiving it is done, simply are wire tapped & are altered.Every Webserverand the Webbrowser are corresponding, they are possible to utilize simply,, but the recognition that is necessary, to the last it is simple system, you do not have to utilize in protection of the important data.