Re:Hash collision in Apple NeuralHash model
by neolog on Wednesday August 18, 2021 @06:39PM
(#28228043)
I'd say the primary differences are that the CSAM scan is a perceptual hash rather than a regular file hash, and that the technical infrastructure of the CSAM system is designed from the ground up to be used against (rather than for) the user and report them individually to authorities for violation.
Re:Hash collision in Apple NeuralHash model
by floatingatoll on Wednesday August 18, 2021 @06:50PM
(#28228135)
Do you have an alternate design in mind that is both "used for the user", and is also effective at reporting CSAM content being uploaded from the device, without allowing CSAM abusers to opt-out of that reporting? I haven't been able to come up with anything myself, but maybe you've had better luck.
Re:Hash collision in Apple NeuralHash model
by neolog on Wednesday August 18, 2021 @08:27PM
(#28228948)
I can only point to other people who know more than me.
https://stratechery.com/2021/apples-mistake/ is a smart tech commentator
https://www.nytimes.com/2021/08/11/opinion/apple-iphones-pri... are two security/encryption experts
https://support.apple.com/guide/security/protecting-against-...
Each system is closed source, provides a mechanism for checking content signatures against files on disk, and is thought to report telemetry to Apple when signatures are found.
How is CSAM scanning new and different from those existing closed-source systems?