Researcher's Analysis of al Qaeda Images Reveals Surprises

Researcher's Analysis of al Qaeda Images Reveals Surprises

blog.wired.com

Neal Krawetz, a researcher and computer security consultant, gave an interesting presentation today at the BlackHat security conference in Las Vegas about analyzing digital photographs and video images for alterations and enhancements.

Using a program he wrote (and provided on the conference CD-ROM) Krawetz could print out the quantization tables in a JPEG file (that indicate how the image was compressed) and determine the last tool that created the image -- that is, the make and model of the camera if the image is original or the version of Photoshop that was used to alter and re-save the image.

(visit the link for the full news article)

This can be a very useful tool around here. It may help debunk or prove a lot of stuff quickly. The concept seems pretty simple.

Does anyone know how to compile the source code? I'd like to give it a try on a few images around here.

blog.wired.com
(visit the link for the full news article)

Already being discussed here : www.abovetopsecret.com...

Edited to fix link.

[edit on 2-8-2007 by InSpiteOf]

[edit on 2-8-2007 by InSpiteOf]