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Furthermore, the picture itself can be traced back to the specific digital camera used to take the picture, as each digital camera imprints a unique signature onto the photo itself (via pixel placement). It is very similar to the way a bullet can be traced back to the gun that fired it.
Uhm that data can be preserved in photoshop, there is a setting that you can set to keep it from altering the signature, and not ALL cameras do this either, but most do.Originally Posted by Rev.Vassago
Digital photos carry a "signature" from the camera, found in the properties of the photo. It describes the type of camera used, the aperture, the f-stop, and can even tell the date and time the photo was taken. Photos edited in Photoshop do not carry this digital signature.Furthermore, the picture itself can be traced back to the specific digital camera used to take the picture, as each digital camera imprints a unique signature onto the photo itself (via pixel placement). It is very similar to the way a bullet can be traced back to the gun that fired it.