Apple’s NeuralHash Algorithm Has Been Reverse-Engineered
Schneier on Security
AUGUST 18, 2021
Apple’s NeuralHash algorithm — the one it’s using for client-side scanning on the iPhone — has been reverse-engineered. Turns out it was already in iOS 14.3, and someone noticed : Early tests show that it can tolerate image resizing and compression, but not cropping or rotations.
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