Comment by pseudalopex
5 years ago
Perceptual hashes aren't cryptographic. The Twitter thread has examples of engineered collisions for a simpler perceptual hash.
5 years ago
Perceptual hashes aren't cryptographic. The Twitter thread has examples of engineered collisions for a simpler perceptual hash.
So we know they are using perceptual hashing and what kind?
"Hashes using a new and proprietary neural hashing algorithm Apple has developed, and gotten NCMEC to agree to use."
That sounds like we know it’s perceptual but not what kind, and therefore we don’t know the collision characteristics.
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