Re:Apple enabling client-side CSAM scanning on iPhone tomorrow
by shrimpx on Thursday August 05, 2021 @09:16PM
(#28082163)
Is it possible to narrow in on a hash using gradient descent? You can correlate distance between inputs to distance between hashes somehow?
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Re:Apple enabling client-side CSAM scanning on iPhone tomorrow
by shrimpx on Friday August 06, 2021 @08:46PM
(#28094548)
Replying to my own question since I can’t edit anymore: it turns out “perceptual hashing,” which I didn’t know much about, has exactly this property, that small changes in the input result in small changes in the output.