ImageNet contains naturally occurring Apple NeuralHash collisions

Re:ImageNet contains naturally occurring Apple NeuralHash co... by theluketaylor on Thursday August 19, 2021 @03:14PM (#28238045)

There are a lot of really valid criticisms of Apple plan here, but Apple has gone out of their way to prevent that exact case. Apple is using secret splitting to make sure they cannot decode the CSAM ticket until the threshold is reached. Devices also produce some synthetic matches to prevent themselves Apple (or anyone else) inferring a pre-threshold count based on the number of vouchers.

https://www.apple.com/child-safety/pdf/CSAM_Detection_Techni...

Threshold Secret Sharing Synthetic Match Vouchers

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Re:ImageNet contains naturally occurring Apple NeuralHash co... by zug_zug on Thursday August 19, 2021 @04:10PM (#28238725)

Thanks. You're right. Very sophisticated system. Still find it morally repugnant, but technologically it is fairly thorough.

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Re:ImageNet contains naturally occurring Apple NeuralHash co... by heavyset_go on Thursday August 19, 2021 @08:19PM (#28240947)

> There are a lot of really valid criticisms of Apple plan here, but Apple has gone out of their way to prevent that exact case.

Not they haven't. The files are still uploaded to Apple's servers where Apple holds their encryption keys. Apple or the FBI could scan the photos for CSAM whenever they want to.

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Re:ImageNet contains naturally occurring Apple NeuralHash co... by theluketaylor on Thursday August 19, 2021 @11:15PM (#28242120)

The contortions apple is going through to scan locally only really make sense if they are gearing up to do end to end encryption of iCloud photos. I imagine they have other prerequisites before they are ready to announce that as a feature, but if they are not planning to encrypt more why wouldn’t they just scan in the cloud?

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