Hi,

I do not know the details of the service, but they could be using
Authentication for Web Applications:
http://code.google.com/apis/accounts/docs/AuthForWebApps.html

--Julian

On Apr 22, 7:50 pm, "[email protected]" <[email protected]> wrote:
> Hi,
>     You might be a finest techno guy. So that i can take your help.
>     i had a mail from a third party providing the link to google docs.
> When i clicked on that link i am able to access the docs. If i logged
> out and i use the same link then it is asking for me to login again.
>     I would like to know how that third party link able access the
> google docs directly if i alreday logged in? how that link is able
> retrive authentication tokens or authenticated automatically for this
> google docs request ?
>
>    I am having too much of interest to know about this!! If you are
> having an idea could you please share this with me?
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