could you provide a source for this? that spunds very counterintuive and bad for the hash functions. especially as the whole point of AI training in this case is detecting new images. And say a small boy at the beach wearing speedos has a lot of similiarity to a naked boy. So looking by some resemblance in the hash function would require the hashes to practically be reversible.

[–] twelvefloatinghands@lemmy.world 4 points 11 months ago* (last edited 11 months ago)

Not all hashes are for security. They're called perceptual hashes

Probably a case of definitional drift of the word, because it probably should be just for the security kind.

[–] ElCanut@jlai.lu 3 points 11 months ago

I'm no expert, but we use those kind of hashes at my company to detect fraudulent software Here's a Wikipedia link: https://en.m.wikipedia.org/wiki/Locality-sensitive_hashing