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A comment on The Problem with Perceptual Hashes. Parent comment

Re:The Problem with Perceptual Hashes by ben_w on Friday August 06, 2021 @04:58PM (#28092647)
While I don’t have any inside knowledge at all, I would expect a company as big as Apple to be able to ask law enforcement to run Apple’s algorithm on data sets Apple themselves don’t have access to and report the result.

No idea if they did (or will), but I do expect it’s possible.

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Re:The Problem with Perceptual Hashes by zimpenfish on Friday August 06, 2021 @05:48PM (#28093146)
> ask law enforcement to run Apple’s algorithm on data sets Apple themselves don’t have access to

Sounds like that's what they did since they say they're matching against hashes provided by NCMEC generated from their 200k CSAM corpus.

[edit: Ah, in the PDF someone else linked, "First, Apple receives the NeuralHashes corresponding to known CSAM from the above child-safety organizations."]

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