Comment on Elsevier
Syn_Attck@lemmy.today 1 week agoThis is a great point. Image watermarking steganography is nearly impossible to defeat unless you can obtain multiple copies of the ‘same’ file from multiple users to look for differences. It could be a change of a single 10-15 pixels from one rgb code off.
rgb(255, 251, 0)
to
rgb(255, 252, 0)
Which would be imperceptable to the human eye. Depending on the number of users it may need to change more or less pixels.
There is a ton of work in this field and its very interesting, for anyone considering majoring in computer science / information security.
sus@programming.dev 1 week ago
I wonder if it’s common for those steganography techniques to have some mechanism for defeating the fairly simple strategy of getting 2 copies of the file from different sources, and looking at the differences between them to expose all the watermarks.
(I’d think you would need sections of watermark that overlap for any 2 or n copies of the data, which may be pretty easy in many cases, though the difference makes detecting the general watermarking strategy massively easier for the un-watermarkers)