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Re:Apple plans to scan US iPhones for child abuse imagery by headShrinker on Thursday August 05, 2021 @06:17PM (#28080739)
You are wrong. It is not a numerical Hash of the exact image.

It is a perceptual Hash of the images characteristics and perceived continent by the algorithm, that’s the “neural” in neuralmatch.

Apple, for yours has been building-in machine learning dedicated chips into their builds so this shouldn’t affect battery life.

Matthew Green is tweeting about this: https://twitter.com/matthew_d_green/status/14230711866160005... and mentions that it is "preceptial hasing"

9 to 5 Mac article, in which they restate that it is not a classical bit-by-bit hash:

https://9to5mac.com/2021/08/05/scanning-for-child-abuse-imag...

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