Website Can Tell If You’re Logged In To Twitter, Facebook, Gmail, etc.

May 21st, 2011

InternetWeb developer Mike Cardwell has created a web page that determines if you’re logged in to various sites. It does this by trying to load something (an image, script, etc.) from those sites—something that you must be logged in to access. A script is executed depending upon whether the load succeeds or fails. Quite tricky, and another reminder that online privacy doesn’t exist.

Link: https://grepular.com/…
(via Slashdot)

One Response to “Website Can Tell If You’re Logged In To Twitter, Facebook, Gmail, etc.”

  1. [link]Josh Says:

    It’s true that your [not so] private data is out but I’m considering using it to improve user experience. C.f. http://www.azarask.in/blog/post/socialhistoryjs/

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