The take from this is that they can potentially track photos outside of their own platform with a disturbing level of precision about who originally uploaded the photo (and much more).
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#facebook is embedding tracking data inside photos you download.
I noticed a structural abnormality when looking at a hex dump of an image file from an unknown origin only to discover it contained what I now understand is an IPTC special instruction. Shocking level of tracking..pic.twitter.com/WC1u7Zh5gN
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I suppose the more concerning issue here is that there is already a variety of advanced techniques to inject data inside photos using steganography such that it would be impossible to forensically detect. If weaponized, it could be used for tracking; with zero proof.
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The IPTC special instruction starts with FBMD; if you download a photo from facebook and dump it using any hex editior you'll see a unique IPTC special instruction, we don't know what it's for but it's very likely tracking of some sort considering every photo has a unique one.
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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Interesting, and I would not be surprised, but it needs to be tested and verified.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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I can imagine a number of different applications, one such example would be identifying the uploader of a photo if that photo was uploaded to Facebook (again) by another person and then correlating the relationship between said photo and person or persons. Many more uses...
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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@kashhill@LaurenGoode@SpectacularSean@CNBCJulianna@FayCortez@lucasmearian@swan_legend@reckless Happy to comment further on it via edin+jusupovic@tutanota.com (remove + from email)#FacebookPrivacyShow this thread -
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