Detecting Video & Audio Tampering

* * 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. "

Comments

Umm...

[dduardo]

How about just doing md5sum ?

Re:No can do

[ResidntGeek]

You're right. It's too bad the Dartmouth professor didn't ask the ACs on slashdot about his work; they obviously know more about it than him.

security through obscurity

[TubeSteak]

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.

Simple.

[Rob T Firefly]

If Paris Hilton is fully dressed, seems fully aware of her surroundings, and/or is singing well, it's been tampered with.

This formula can also be adapted to Lindsay Lohan, but hasn't been tested on Tara Reid or others yet.