Tracing people by photos on facebook

Security Researcher 'Rjcrystal Decoder' has found a way to find someone profile id using the link to an image file. He explained how to do this in his own blog post.

This trick will helpful to find a person who uploaded image file to facebook by getting the url of the image.  For example:


www.some.fcbdn.akamahid.net/216512_204732556226334_100000687732419_582854_6270883_n.jpg

Here the highlighted one is profile ID of user who uploaded the image. It may look like a simple sequence numbers.  We can get the information of user by using the facebook Graph API.

http://graph.facebook.com/?id=Profile_ID

In our example:
 http://graph.facebook.com/?id=100000687732419

Or you can directly go to the user profile by simply entering the profile ID at the end of this URL:
www.facebook.com/profile.php?id=

In our example:

www.facebook.com/profile.php?id=100000687732419