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0 pointsmdoms4y ago0 comments

You're assuming that perceptual hashes are uniformly distributed, but that's not the case. If I post a picture of my kid at the beach I'm far, far more likely to generate perceptual hashes closer to the threshold. Not to mention intimate photos of/with my partner.

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HALtheWise4y ago

Good point about the possibility of capturing a bunch of distinct photos with the same perceptual hash, either by taking a burst of photos or by editing one photo a bunch of times. I guess a better implementation would never upload two different encryption keys for the same perceptual hash and just send dummy data instead, but I haven't seen any indication that they actually do that.

dannyw4y ago

yep. what if i take a burst of 12 photos that all incorrectly fall as a false positive to NeuralHash (which is a ML black box), and an Apple reviewer is now invading my privacy by looking at my photo library?

ec1096854y ago

The the technical paper Apple put out that is linked to in the post talks about the risk, but isn’t very helpful

“Several solutions to this were considered, but ultimately, this issue is addressed by a mechanism outside of the cryptographic protocol.”

dannyw4y ago

Not acceptable for a technology being deployed to hundreds of millions of people.

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0 pointsmdoms4y ago0 comments

0 comments

HALtheWise4y ago

dannyw4y ago

ec1096854y ago

The the technical paper Apple put out that is linked to in the post talks about the risk, but isn’t very helpful

“Several solutions to this were considered, but ultimately, this issue is addressed by a mechanism outside of the cryptographic protocol.”

dannyw4y ago

Not acceptable for a technology being deployed to hundreds of millions of people.

j / k navigate · click thread line to collapse