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Javascript and Cookies

Posted on 2013-06-18
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Last Modified: 2013-06-19
I was informed that web sites you log into can identify you through javascript and cookies.
I was also informed that a web site can identify you through their cookies even if you're using a different computer to log into their web site than you used before .
So my questions are:
1. How does javascript identify you?
2. How can a web site identify you through their cookies if you're using a different computer to log into their web site than you used in the past?
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Question by:NeedAnAnswer123
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Dave Baldwin earned 500 total points
ID: 39257260
1. Javascript by itself can not identify you.

2. A web site can not identify you if you have never used that computer before.  If you used it to log on last year, the cookie from that time may still be on the computer.  I have over a dozen computers here and if I have never used one of them to log on to Experts-Exchange, I have to enter my username and password again to gain access when I am on one I haven't used before.

If you are connecting in all cases from the same LAN and thru the same gateway, your public IP address will be the same.  The web server may be tracking that.

0. You should probably find someone else to ask about these things because someone is giving you inaccurate info.
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Author Comment

by:NeedAnAnswer123
ID: 39258314
Mr. Baldwin
Thanks for your answer.  Yes, I thought the information was inaccurate.
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LVL 83

Expert Comment

by:Dave Baldwin
ID: 39258569
You're welcome, thanks for the points.
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