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Given that changing one pixel of an image changes its hash, then I doubt that the hash would be the sole criteria for flagging an image. The systems are much mo
by Normille 4y ago
Given that changing one pixel of an image changes its hash, then I doubt that the hash would be the sole criteria for flagging an image. The systems are much more likely to be availing of image-recognition software... ID young face or body... ID lack of clothing... ID adult present... <insert klaxxon sound effects>
- zimpenfish 4y ago> Given that changing one pixel of an image changes its hash They don't use SHA/MD5 style hashes for CSAM image matching; they use "perceptual hashes"[1] which are resilient to changes (specifically, I believe, PhotoDNA[2] from Microsoft.) [1] https://en.wikipedia.org/wiki/Perceptual_hashing https://en.wikipedia.org/wiki/Perceptual_hashing [2] https://www.microsoft.com/en-us/photodna https://www.microsoft.com/en-us/photodna
- Normille 4y agoThanks for explaining. The person who replied originally just said 'hash', so I assumed SHA/MD5