What are some ways to identify a logged in user on the web?

Posted by farinspace on Stack Overflow See other posts from Stack Overflow or by farinspace
Published on 2010-05-06T15:08:00Z Indexed on 2010/05/06 15:28 UTC
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Here is the scenario:

There are 5 websites (different domain names) that need to share a session. I am using a bit of code on each site which returns a "blank.gif" image and at the same time sets the session (syncing it up to the current session). Each of the sites calls a session-img from each of the other sites. Also, all sites have access to the same database (where the session is stored). This works great on FF and Chrome, but not on IE (or Safari PC)...

I need to come up with an alternative method to keep a session active? The app is a small custom CMS, so really only 2-3 people will be using it.

I can probably identify user logins by IP and then continue to check for the IP accross all sites...

Is there something more granular such as a computer uuid that i can check for?

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