I think everyone here would be knowing that, if I am logged in any of the google’s website(i.e http://www.orkut.com), I don’t need to authenticate again for http://www.gmail.com.
How google is managing this. I think, it would be a cookie stored on user’s browser. But, if it is a cookie, how different domains are able to read this cookie.
What do you say.
I think everyone here would be knowing that, if I am logged in any
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They use a system simmlar to OpenID
http://www.windley.com/archives/2006/04/how_does_openid.shtml