According to a new research each digital camera leaves its own finger print on the image that is captured by it.In other words each picture taken by a digital camera is overlaid by a weak noise like pattern of pixel non uniformity.This is unique to each camera.Interesting isn't it..:-)
Just think what ramification it would have on the law enforcement..see the following for more details…
http://www.eurekalert.org/pub_releases/2006-04/bu-bur041806.php
