funsec mailing list archives
Re: [privacy] Digital Camera Fingerprints
From: "Andrew Blair" <Andrew.Blair () genmills com>
Date: Mon, 24 Apr 2006 12:19:19 -0500
Another interesting application would be altering one photograph to match the "unique" signature of another camera. If you were really out for revenge you could find that child pr0n and match it to a digital camera owned by the target. Tip off the fuzz and they could have a lot of explaining to do. AB -----Original Message----- From: Fergie [mailto:fergdawg () netzero net] Sent: Monday, April 24, 2006 11:08 AM To: jpolazzo () thesportsauthority com Cc: privacy () whitestar linuxbox org Subject: Re: [privacy] Digital Camera Fingerprints Be on the lookout for tools to "de-fingerprint" digital images -- software which can remove unique pixalization characteristics of images related to a given digital camera without significantly degradinging the image quality. :-) In fact, one would think that any given steganography software would already suffice: http://www.jjtc.com/Steganography/ - ferg -- "Justin Polazzo" <jpolazzo () thesportsauthority com> wrote: http://www.boingboing.net/2006/04/22/digital_cameras_have.html 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. 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. -------------------------------- I can think of good and bad uses for this technology (as with all), but the idea of being able to tell who is _taking_ the child pr0n pictures is pretty enticing. -JP -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg () netzero net or fergdawg () sbcglobal net ferg's tech blog: http://fergdawg.blogspot.com/ _______________________________________________ privacy mailing list privacy () whitestar linuxbox org http://www.whitestar.linuxbox.org/mailman/listinfo/privacy _______________________________________________ privacy mailing list privacy () whitestar linuxbox org http://www.whitestar.linuxbox.org/mailman/listinfo/privacy
Current thread:
- [privacy] Digital Camera Fingerprints Justin Polazzo (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Richard M. Smith (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Marius Gheorghescu (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Scott Manley (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Marius Gheorghescu (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Dave Dittrich (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Michal Zalewski (Apr 24)
- <Possible follow-ups>
- Re: [privacy] Digital Camera Fingerprints Fergie (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Justin Polazzo (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Marius Gheorghescu (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Justin Polazzo (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Andrew Blair (Apr 24)
- Re: [privacy] Digital Camera Fingerprints Richard M. Smith (Apr 24)