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Facebook; is it passing personal information across to other websites

A few days ago I followed a link in a friend's posting on facebook and was faintly surprised to see a list of a few of my friends in a  sidebar who had done something or other. At the time I was in a rush and couldn't follow it up but made a mental note and moved on. Today I followed another friend's link to a Washington post article, subsequently following a link in that article to a piece on prospect.org. Strangley, at the end of the article, above a bunch of the usual article comments, was a comment entry box with my name and my Facebook avatar next to it. Further up the page was a logout link. I've never created an account with prospect.org, I hadn't logged into the site - as if I could - and it's unlikely, even if I had an old account there, that I'd been auto logged in because I'm using a spanking new computer, only an hour out of the box; no auto login from months ago or anything. I also have 3rd party cookies turned off. My Facebook security is set pretty tight.

So I'm asking myself, what's going on, is Facebook pulling naughties again? Thoughts, ideas, etc? 

:12581


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  • If you have logged into Facebook it will show you as logged into any sight that is using Facebook for cetralized authentication. The third party is not reading you cookie, they are simply checking with Facebook to see whether you are logged in at the moment, and if so asking Facebook to display your avatar etc. At least that is my understanding. If you don't want anyone to know you are on Facebook be sure to log out after each use, or use a different browser exclusively for Facebook so other sites can't identify you.

    Chester

    :12649
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  • If you have logged into Facebook it will show you as logged into any sight that is using Facebook for cetralized authentication. The third party is not reading you cookie, they are simply checking with Facebook to see whether you are logged in at the moment, and if so asking Facebook to display your avatar etc. At least that is my understanding. If you don't want anyone to know you are on Facebook be sure to log out after each use, or use a different browser exclusively for Facebook so other sites can't identify you.

    Chester

    :12649
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