Macworld reports that researchers at Princeton University and University College London say they can identify unique information, essentially like a 
fingerprint, from any sheet of paper using any reasonably good scanner. Their findings will be presented at the IEEE security conference in May, 2009.
“We’ve found a way to identify documents even when there was nothing additional printed on them,” said Alex Halderman, who was part of the Princeton team. “This is like an invisible serial number printed on every piece of paper ever made.”
Isn’t this exciting? In addition to finding obvious applications such as detecting counterfeited currency notes, there could be other interesting main-stream applications related to legal contracts etc,. too. We are quite intrigued by this technology and its possible applications to our customers.
