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The hashing could be done client side to avoid giving Facebook your, ahem, personal data. Other than that it's a clever idea, but it would be need to be done everywhere in order to be effective. What's stopping the person posting the revenge porn from just putting it on 4chan?


dd if=/dev/zero bs=1 count=1 >> image.jpg

look, ma, different hash!


You're thinking of cryptographic hashes. Perceptual hashes don't do that.




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