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A comment on Apple Regrets Confusion over 'iPhone Scanning'. Parent comment

Re:Apple Regrets Confusion over 'iPhone Scanning' by gambiting on Friday August 13, 2021 @05:40PM (#28174900)
I'm constantly surprised how even people on HN are confused about this - read the white paper apple published. It very explicitly says that they are using a perceptual(similarity based) hash, and we(well, not me specifically, researchers) have demonstrated that it's trivial to produce a picture that isn't even remotely similar in theme but still produces the same perceptual hash.

Apple's solution to this problem is that their employee will actually verify the picture before sending it to authorities. Which again, is one of the problems people have with this system.

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Re:Apple Regrets Confusion over 'iPhone Scanning' by throwaway81523 on Friday August 13, 2021 @09:37PM (#28176986)
If that hash stuff actually works (identifies CSAM with high probability), then that puts Apple in the position of knowingly possessing CSAM. The "One Bad Apple" article a couple days ago mentions that their staff was sometimes exposed to CSAM but that it was unknowing, because the prior probability of an image they looked at being CSAM was quite low. If the probability was high (like > 50%?), it wounded like they would have been obligated to send it to NCEMC without looking at it.

https://www.hackerfactor.com/blog/index.php?/archives/929-On...

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