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| flying-hears.emb.png | flying-hears.emb-x.png |
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| usdollar.emb.png | usdollar.emb-x.png |
Fragility of The Embedded Data
(KIT STEGROUP)
The following pictures on the left side of the page are two stego images copied from Sample Stego Images 1, and Sample Stego Images 2 pages. While, two other pictures to the right are very slightly tampered images. (Look at the "Flying hearts ..." portion and the "forehead" on the $500 note.)
You will see, by using QtechHV-v011, that nothing is extracted from the two tampered images. This is because the embedded data in the tampered images are broken by a small amount of image alteration. Also, you will see that the embedded JPEG images are much more fragile. Check this JPEG example page.
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| flying-hears.emb.png | flying-hears.emb-x.png |
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| usdollar.emb.png | usdollar.emb-x.png |
References
[9] Koichi Nozaki, Hideki Noda, et al: A Model of Unforgeable Digital Certificate Document System, in Information Modelling and Knowledge Bases XVI, pp.203-210, IOS Press, 2005. (Download: 787KB)
(Updated: Mar. 16, 2016 by Eiji Kawaguchi)