  In the field of forensic imaging, it is important to be able to extract a
'camera fingerprint' from one or a small set of images known to have been taken
by the same camera. Ideally, that fingerprint would be used to identify an
individual source camera. Camera fingerprint is based on certain kind of random
noise present in all image sensors that is due to manufacturing imperfections
and thus unique and impossible to avoid. PRNU (Photo-Response Non-Uniformity)
has become the most widely used method for SCI (Source Camera Identification).
In this paper, we design a set of 'attacks' to a PRNU based SCI system and we
measure the success of each method. We understand an attack method as any
processing that alters minimally image quality and that is designed to fool
PRNU detectors (or, generalizing, any camera fingerprint detector). The PRNU
based SCI system was taken from an outstanding reference that is publicly
available.
