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Detecting Video & Audio Tampering

Posted by Hemos on from the the-telltale-heart dept.

* * Beatles-Beatles writes "Dartmouth professor Hany Farid already devised software tools to detect when someone has tampered with digital photos. His next challenge: determining whether video or audio files have been retouched. "

1 of 39 comments (clear)

  1. security through obscurity by TubeSteak · · Score: 3, Interesting
    Most likely, distribution will be limited: Photo editors, but not freelance photographers, at mainstream media outlets may get the software.

    "You do diminish the power the software if you make it completely, widely available," he said.
    Since they mention JPEG quantization tables as one of the main methods of identifying what program/camera a photograph came from... How hard would it be to replace the quant table with your own? Or even just tweak it enough that the program can't ID it.

    It just doesn't strike me as a terribly reliable way to ID a picture's origin. Might as well rely on the EXIF data.
    --
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