http://u2r2h-documents.blogspot.com/2007/08/us-psyop-photo-fakery-proof.html
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.
Comparing that data to the metadata embedded in the image he could
determine if the photo was original or had been re-saved or altered.
Then, using error level analysis of an image he could determine what
were the last parts of an image that were added or modified.
http://u2r2h-documents.blogspot.com/2007/08/us-psyop-photo-fakery-proof.html
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| User: "Perseid" |
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| Title: Re: Fake Terror Video analysis (US Intel Center) |
07 Aug 2007 10:36:43 AM |
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After Much Chewing of Cud and Cogitation, Spat the Words
http://u2r2h-documents.blogspot.com/2007/08/us-psyop-photo-fakery-
proof.html
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.
Comparing that data to the metadata embedded in the image he could
determine if the photo was original or had been re-saved or altered.
Then, using error level analysis of an image he could determine what
were the last parts of an image that were added or modified.
It sounds like a lot of math.. could be useful though. Those blackhat
and defcon people are quite interesting.. they make hacking sexy (just
so long as they don't take over my computer).
http://u2r2h-documents.blogspot.com/2007/08/us-psyop-photo-fakery-
proof.html
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