Hash collision in Apple NeuralHash model

Re:Hash collision in Apple NeuralHash model by hdjjhhvvhga on Wednesday August 18, 2021 @07:07AM (#28219670)

My WhatsApp automatically saves all images to my photo roll. It has to be explicitly turned off. When the default is on, it's enough that the image is received and the victim has CP on their phone. After the initial shock they delete it, but the image has already been sent to Apple, where a reviewer marked it as CP. Since the user already gave them their full address data in order to be able to use the app store, Appla can automatically send a report to the police.

[ Parent | on HN ]

Re:Hash collision in Apple NeuralHash model by tpush on Wednesday August 18, 2021 @09:39AM (#28220778)

> [...] Appla can automatically send a report to the police.

Just to clarify, Apple doesn't report anyone to the police. They report to NCMEC, who presumably contacts law enforcement.

[ Parent | on HN ]

Re:Hash collision in Apple NeuralHash model by dannyw on Wednesday August 18, 2021 @01:13PM (#28224273)

FBI agents work for NCMEC. NCMEC is created by legislation. They ARE law enforcement, disguised as a non-profit.

[ Parent | on HN ]

Re:Hash collision in Apple NeuralHash model by zimpenfish on Wednesday August 18, 2021 @07:25AM (#28219774)

> but the image has already been sent to Apple, where a reviewer marked it as CP

No, the images are only decryptable after a threshold (which appears to be about 30) is breached. If you've received 30 pieces of CSAM from WhatsApp contacts without blocking them and/or stopping WhatsApp from automatically saving to iCloud, I gotta say, it's on you at that point.

[ Parent | on HN ]

Re:Hash collision in Apple NeuralHash model by basilgohar on Wednesday August 18, 2021 @07:55AM (#28219974)

Just a side point, a single WhatsApp message can contain up to 30 images. 30 is the literal max of a single message. So ONE MESSAGE could theoretically contain enough images to trip this threshold.

[ Parent | on HN ]

Re:Hash collision in Apple NeuralHash model by zimpenfish on Wednesday August 18, 2021 @08:05AM (#28220035)

> a single WhatsApp message can contain up to 30 images

A fair point, yes, and somewhat scuppering towards my argument.

[ Parent | on HN ]

Re:Hash collision in Apple NeuralHash model by avianlyric on Wednesday August 18, 2021 @07:55AM (#28219970)

You’re aware that people sleep at night, and phones for the most part don’t, right?

[ Parent | on HN ]

Re:Hash collision in Apple NeuralHash model by BrianOnHN on Wednesday August 18, 2021 @07:43AM (#28219893)

Victim blaming because of failure to meet some seemingly arbitrary limit, ok.

[ Parent | on HN ]