Nbadan
08-13-2007, 04:46 PM
Is Anyone surprised?
Al Qaeda Videos May Be Doctored
August 13, 2007 10:59 AM
Maddy Sauer Reports:
Media and terrorism experts alike have remarked on the increasing sophistication of al Qaeda propaganda videos that continue to be released by the group's media wing, as Sahab.
One computer expert, however, has conducted extensive image analysis on many of the videos and concluded that in many cases the tapes were likely doctored to give a false impression of the speaker's location.
Neal Krawetz, founder of Hacker Factor, a computer security and consulting firm, created a computer program which he uses to analyze screen frames from various al Qaeda videos, including those of al Qaeda No. 2 Ayman al Zawahri and American al Qaeda commander Adam Gadahn. His software suggests that in many cases the sophisticated backgrounds were likely added after the video of the speaker was recorded.
Photos: See What's Behind al Qaeda's Propaganda Tapes
By looking at the error levels of the different elements in the still frames, or JPEGs, he can tell which elements are older and which are newer. In other words, he can tell which areas of the video were modified more recently.
For example, in one video of Zawahri released in July of last year, he appears to be seated in a news studio complete with a backdrop of images of the World Trade Center attacks and hijacker Mohammed Atta.
News commentators at the time remarked on how Zawahri, who many assumed to be hiding in a cave, was able to record a video message from a high-tech newsroom.
Krawetz, however, says that background was very likely added after Zawahri filmed his message.
"That's the fakest one so far," said Krawetz.
Krawetz found six different layers on one JPEG from that video, implying the various background components were very likely added after Zawahri recorded his message.
Krawetz says an even more visible clue occurs as the video itself plays, when there is a subtle shifting of the camera. The image of Zawahri appears to move side-to-side as if the camera is shaking while the background remains still.
In another video of Zawahri released in August 2005, the same summer as the bombing attacks on the London subway system, Zawahri appears outside of a tent with his trusted Kalashnikov behind him. At the time, some in the media remarked at the brazen message delivered in broad daylight just a few weeks after the London attacks.
Krawetz, however, notes that while the sunlight moves against the backdrop, the light levels on Zawahri's face never change. Once again, this implies the background could have been added after the video monologue was recorded. While it may appear he is staring into the sun because of the reflection in his eyeglasses, Krawetz speculates he was actually seated in front of a spotlight.
On the eve of the 9/11 anniversary last year, Zawahri and American al Qaeda leader Adam Gadahn released a video in which Gadahn praised the hijackers and their mission. On the tape, Gadahn is seen seated in a white room with a computer and books behind him.
After analyzing the image, Krawetz determined the books were at different error levels and a different color spectrum than the rest of the room, implying they were added when the subtitles and as Sahab logo were added to the video. Whether this was an attempt to send a message to followers, an attempt to hide something else in the background or served any purpose at all remains unclear
ABC News (http://blogs.abcnews.com/theblotter/2007/08/al-qaeda-videos.html)
From Wired on the same story, this time not doctored by ABC:
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.
Krawetz's most telling discovery comes in the form of a detail contained in a 2006 Ayman al-Zawahiri tape. From his analysis he concludes that the As-Sahab logo (the alleged media arm of Al-Qaeda) and the IntelCenter logo (a U.S. based private intelligence organization that "monitors terrorist activity") were both added to the video at the same time.
Wired (http://blog.wired.com/27bstroke6/2007/08/researchers-ana.html)
Could some 911 phone calls made from planes supposedly at 10000ft been faked too?
When Seeing and Hearing Isn't Believing
By William M. Arkin
Special to washingtonpost.com
Monday, Feb. 1, 1999 (http://www.washingtonpost.com/wp-srv/national/dotmil/arkin020199.htm)
:hat
Al Qaeda Videos May Be Doctored
August 13, 2007 10:59 AM
Maddy Sauer Reports:
Media and terrorism experts alike have remarked on the increasing sophistication of al Qaeda propaganda videos that continue to be released by the group's media wing, as Sahab.
One computer expert, however, has conducted extensive image analysis on many of the videos and concluded that in many cases the tapes were likely doctored to give a false impression of the speaker's location.
Neal Krawetz, founder of Hacker Factor, a computer security and consulting firm, created a computer program which he uses to analyze screen frames from various al Qaeda videos, including those of al Qaeda No. 2 Ayman al Zawahri and American al Qaeda commander Adam Gadahn. His software suggests that in many cases the sophisticated backgrounds were likely added after the video of the speaker was recorded.
Photos: See What's Behind al Qaeda's Propaganda Tapes
By looking at the error levels of the different elements in the still frames, or JPEGs, he can tell which elements are older and which are newer. In other words, he can tell which areas of the video were modified more recently.
For example, in one video of Zawahri released in July of last year, he appears to be seated in a news studio complete with a backdrop of images of the World Trade Center attacks and hijacker Mohammed Atta.
News commentators at the time remarked on how Zawahri, who many assumed to be hiding in a cave, was able to record a video message from a high-tech newsroom.
Krawetz, however, says that background was very likely added after Zawahri filmed his message.
"That's the fakest one so far," said Krawetz.
Krawetz found six different layers on one JPEG from that video, implying the various background components were very likely added after Zawahri recorded his message.
Krawetz says an even more visible clue occurs as the video itself plays, when there is a subtle shifting of the camera. The image of Zawahri appears to move side-to-side as if the camera is shaking while the background remains still.
In another video of Zawahri released in August 2005, the same summer as the bombing attacks on the London subway system, Zawahri appears outside of a tent with his trusted Kalashnikov behind him. At the time, some in the media remarked at the brazen message delivered in broad daylight just a few weeks after the London attacks.
Krawetz, however, notes that while the sunlight moves against the backdrop, the light levels on Zawahri's face never change. Once again, this implies the background could have been added after the video monologue was recorded. While it may appear he is staring into the sun because of the reflection in his eyeglasses, Krawetz speculates he was actually seated in front of a spotlight.
On the eve of the 9/11 anniversary last year, Zawahri and American al Qaeda leader Adam Gadahn released a video in which Gadahn praised the hijackers and their mission. On the tape, Gadahn is seen seated in a white room with a computer and books behind him.
After analyzing the image, Krawetz determined the books were at different error levels and a different color spectrum than the rest of the room, implying they were added when the subtitles and as Sahab logo were added to the video. Whether this was an attempt to send a message to followers, an attempt to hide something else in the background or served any purpose at all remains unclear
ABC News (http://blogs.abcnews.com/theblotter/2007/08/al-qaeda-videos.html)
From Wired on the same story, this time not doctored by ABC:
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.
Krawetz's most telling discovery comes in the form of a detail contained in a 2006 Ayman al-Zawahiri tape. From his analysis he concludes that the As-Sahab logo (the alleged media arm of Al-Qaeda) and the IntelCenter logo (a U.S. based private intelligence organization that "monitors terrorist activity") were both added to the video at the same time.
Wired (http://blog.wired.com/27bstroke6/2007/08/researchers-ana.html)
Could some 911 phone calls made from planes supposedly at 10000ft been faked too?
When Seeing and Hearing Isn't Believing
By William M. Arkin
Special to washingtonpost.com
Monday, Feb. 1, 1999 (http://www.washingtonpost.com/wp-srv/national/dotmil/arkin020199.htm)
:hat