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A comment on Hash collision in Apple NeuralHash model. Parent comment

Re:Hash collision in Apple NeuralHash model by soziawa on Wednesday August 18, 2021 @06:29AM (#28219461)
> 6. Apple's CSAM detection then flags these, and they're manually reviewed

Is the process actually documented anywhere? Afaik they are just saying that they are verifying a match. This could of course just be a person looking at the hash itself.

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Re:Hash collision in Apple NeuralHash model by FabHK on Wednesday August 18, 2021 @06:35AM (#28219492)
They look at the contents of the "safety voucher", which contains the neural hash and a "visual derivative" of the original image (but not the original image itself).

https://www.apple.com/child-safety/pdf/CSAM_Detection_Techni...

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Re:Hash collision in Apple NeuralHash model by hughrr on Wednesday August 18, 2021 @06:44AM (#28219537)
If it’s a visual derivative, whatever that means, then how does the reviewer know it matches the source image? Sounds like there’s a lot of non determinism in there.
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