Digital cameras have unique "noise" fingerprints?
A researcher at SUNY Binghamton reports that he can tell which camera took any given photo by matching the photo's unique "weak noise-like pattern of pixel-to-pixel non-uniformity."Like actual fingerprints, the digital "noise" in original images is stochastic in nature – that is, it contains random variables – which are inevitably created during the manufacturing process of the camera and its sensors. This virtually ensures that the noise imposed on the digital images from any particular camera will be consistent from one image to the next, even while it is distinctly different.(via MeFi)In preliminary tests, Fridrich's lab analyzed 2,700 pictures taken by nine digital cameras and with 100 percent accuracy linked individual images with the camera that took them.
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Cory Doctorow
Upcoming appearances
* Feb 9, 2012, DeKalb, IL: Day of Doctorow, NIU
* Feb 10-12, 2012, Chicago, IL: Capricon 32
* Feb 13, 2012, Arlington, TX: UT Arlington College of Engineering Distinguished Speaker Series
* Feb 16, 2012, Victoria, BC: 13th Annual Privacy and Security Conference
Recent books:
* Context (essays)
* With a Little Help (short stories)
* For the Win (YA novel)
* Makers (adult novel)
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