Comments on: Adobe eyes fraud-busting tools for Photoshop

If Adobe goes through with its plans, finding photo fraud will be far simpler.

[Penguinisto]

That's nice...

...and will prolly last about as long as it takes for someone to cook up an EXIF data editor capable of breaking whatever encryption they toss at it (or simply rips the old one out and sticks a replacement EXIF header in...)

I give it about 24 hours. Perhaps 48.

/P

[cnetuser234]

Nope, not EXIF

No, I don't think so, you don't need EXIFs at all for this.
The software examines the pixels. Each camera produces
noise, and the pattern of that noise, in addition to depending how
it was compressed, will vary between different brands.
After all, the EXIF is maintained, even though the photo
can be manipulated. So, manipulation is only detected by
looking at the actual image.

[lindroart]

Good Photo editors could still "edit" without detection

As a graphic artist who's used PhotoShop from 1.0 to the current
version, I doubt this "detection" will work if someone with enough
experience does the editing. There's ways to get around this. If a
photo is "edited" without using the cloning tool the technique won't
work, will it? Printing an "edited" photo out and then rescanning
(with a filter?) may be another way. And those two ideas are just
off the top of my head.

[Professor Cornbread]

Why bother?

Why even bother? I could edit a photo, print it out with a high definition printer and then take a picture of it...or project it...or any number of tricks

[marc_90292]

REALLY!!!

As if PhotoShop couldn't use another polishing.
Now Adobe slips into the uniform of CSIs

[ralfthedog]

can be used as a tool to help make fraud harder to detect.

First, keep editing your photo until everything but the quantization tables checks as legit. Then save using a plugin that uses Canon quantization tables.


You would need to use original photos, or stock shots taken in raw mode. Double compression would be detectable. The only truly hard part would be writing the canon plugin.