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 Forum index » Archive » Archive: MetaCortechs » MetaCortechs: General/Updates
Steganography
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burnin
Boot

Joined: 04 Oct 2003
Posts: 20

 		Steganography
I'm pretty sure that we are kind of stuck because the next step involves steganography.

Some images I'm suspicious about:

http://www.metacortechs.com/wallpaper/600x480.jpg [217.247 bytes]

http://www.metacortechs.com/wallpaper/800x600.jpg [300.195 bytes]

Both images are actually 800x600. Furthermore, 600x480 is not a regular resolution. So "80" might be a hint to the steg's passphrase.

http://www.paintover.net/_cpy/archives/00000001.jpg [[38.425 bytes]

This is an obvious candidate. Possible passphrase hints are "TavernPoite" or "99" (Eye See = IC = 99, in romans).

http://www.little-boxes.net/archives/KnowledgeBase/attachments/59-blackout.jpg [100.382 bytes]

Has anyone realised that even though this is supposed to be a picture of a blackout, the lights are all on? Possible passphrase hints are the writings in the picure ("003/45/7844", "ISAT GeoStar 45", "23:15 EST 14 Aug. 2003").

The satellite name also looks suspicious. Did anyone investigate on it?

PostPosted: Sat Oct 04, 2003 12:03 pm
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marv
Guest


 		about the satellite photo:


Quote:
Tuesday, September 09, 2003

Fake blackout photo

My father just sent me an amazing satellite photo of the blackout we had in August. It was taken by the ISAT GeoStar 45 satellite on August 14, 2003. Maybe you've seen it. Maybe you marveled at the darkness enveloping Cleveland, Toronto, Detroit and New York. Sorry dad, there is no ISAT GeoStar 45 satellite and the photo is a fake.

Do a Google search for blackout photo and you'll come across links saying the photo is a fake. You'll also find a link to the NOAA (National Oceanic and Atmospheric Administration) with some real images of the northeast blackout in August.

It looks like some joker took one of the many hires photos from NASA's Visible Earth - Earth's City Lights and had some fun in Adobe PhotoShop.

Don't feel bad if you thought the photo was real. Rumour has it that the Economist magazine was duped as well.


(from a blog)

and there's some more info at http://www.breakthechain.org/exclusives/blackoutsat.html too.

PostPosted: Sat Oct 04, 2003 12:14 pm
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enidcoleslaw
Boot

Joined: 03 Oct 2003
Posts: 22
Location: Virginia

 		The Litte-Boxes satellite image is a fake that's been floating around the Internet for months. See:

http://www.snopes.com/photos/blackout.asp

PostPosted: Sat Oct 04, 2003 12:16 pm
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burnin
Boot

Joined: 04 Oct 2003
Posts: 20

 		Great, so there is actually something inside the satellite photo. If you check, it's exactly the same picture as this:

http://www.ulrp.com/photos/graphics/blackout.jpg

Both are 600x528, except that little-boxes's is 100.382 bytes and ulrp's is 59.887 bytes. Something is wrong... Confused

edit: notice the filenames (blackout.jpg vs 59-blackout.jpg. Might be related to the original filesize? A passphrase hint? It's also the image archive's number, so it might not be anything.)

PostPosted: Sat Oct 04, 2003 12:30 pm
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AnthraX101
Entrenched

Joined: 18 Mar 2003
Posts: 797

 		http://forums.unfiction.com/forums/viewtopic.php?t=2529

AnthraX101

PostPosted: Sat Oct 04, 2003 2:59 pm
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burnin
Boot

Joined: 04 Oct 2003
Posts: 20
AnthraX101 wrote:
http://forums.unfiction.com/forums/viewtopic.php?t=2529

AnthraX101


I had seen that. Try to run it on 59-blackout.jpg

And I still think there something into 800x600.jpg. Can it show false negatives Smile

PostPosted: Sat Oct 04, 2003 3:05 pm
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Nikkon
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Quote:
Has anyone realised that even though this is supposed to be a picture of a blackout, the lights are all on?


Look at the picuture again a hugh section of the mid alantic his blacked out....[/quote]

PostPosted: Sat Oct 04, 2003 3:14 pm
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AnthraX101
Entrenched

Joined: 18 Mar 2003
Posts: 797
Quote:
59-blackout.jpg : negative


Yes, it can show false negatives, but is doubtfull. I will run a more detailed test for 800x600 for you.

AnthraX101

PostPosted: Sat Oct 04, 2003 3:20 pm
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Marl64
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Joined: 04 Oct 2003
Posts: 456
Location: Prisoner of Zion

 		The problem I see is that we have no way of knowing how big the file should be - it could just be saved at a very low compression rate, or it coud have stuff burried in there.

Which got me thinking.

How does the Steg Analyser work?

I would assume it attempts to render the image and then looks to see what wasn't used (down to the bit level, as I understand that Steg programs can use redundant bits to store data).

So does anyone know of a program that will do the same, but then spit out the remaining data for manual analysis. In case it's not a Stegged file, but something using a similar principal.

Hey I'm clutching at straws here Confused

PostPosted: Sat Oct 04, 2003 6:30 pm
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AnthraX101
Entrenched

Joined: 18 Mar 2003
Posts: 797
Quote:
Loaded 1 files...
59-blackout.jpg : negative
Processed 1 files, found 0 embeddings.
Time: 2193 seconds: Cracks: 13690542, 6242.8 c/s


It would be hard to do something like that. Stegonagraphy works by making people think that there is nothing there. Its entire purpose is to hide in plain sight. You need to know the algorithms to know what to look for.

Typicaly what they do is change the lowest level bits in the picture, making as little change as possible visualy.

AnthraX101

PostPosted: Sat Oct 04, 2003 7:06 pm
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Marl64
Unfettered


Joined: 04 Oct 2003
Posts: 456
Location: Prisoner of Zion
AnthraX101 wrote:

Typicaly what they do is change the lowest level bits in the picture, making as little change as possible visualy.

AnthraX101


ah! so it does affect the image. I thought it just used (or created) dead space in the file structure - data not used to construct the picture.

Thanks for the explanation

PostPosted: Sat Oct 04, 2003 7:26 pm
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