How Can I Know User PC

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How can I control user without user and password to limit for using some service on my website after one time using to 24 hours later.In fact my problem is in recognize user pc for controle it to use our service?
If anybody know please help me .

Posted 13-May-10 3:15am

sorosh04

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#realJSOP · Answer 1 · 2010-05-13T03:19:00

Well, you could use a cookie and store it on the person's machine, but that could be defeated if they use another machine.

Essentially you can't really control what a user does unless a) he's not registered or b) you make him log in first. Once logged in, any number of mechanisms could be used to restrict acess.