[salawat]

How do you know? Do you have access to Apple's algorithms and an account to generate enough hits, and access to the safety vouchers and decryption system to verify your assertions?

I mean, if you're calling someone out, at least provide some evidence yourself. Short of a reproducible outcome, you're just as questionable in conclusion as the poster.

[zepto]

No. I have access to the published information on how the system works, and I have access to the poster’s claim.

The poster’s claim is false based on what they have said.

> you're just as questionable in conclusion as the poster.

Not correct. You don’t need evidence to disprove a claim that is logically false. The poster’s claim is logically false.

Here is a copy of the explanation I gave elsewhere:

—-

I can be certain because I have looked at the images, and they are obviously not CSAM. Since the visual derivative is generated from CSAM, any spoof must look like it could be mistaken at a glance for CSAM.

What prevents a generated image from matching both is that the attacker would need to know what the image they are trying to spoof looks like, in order to make a false positive of both. I.e. the attacker would need a copy of the original CSAM, and the spoofed file would end up looking like it could be at least plausibly mistaken for that exact image.

[ac29]

> I can be certain because I have looked at the images, and they are obviously not CSAM. Since the visual derivative is generated from CSAM, any spoof must look like it could be mistaken at a glance for CSAM.

Isnt this making the relatively huge assumption that humans and Apple's algorithms have the exact some opinion of what something "looks like"?

[zepto]

> Isnt this making the relatively huge assumption that humans and Apple's algorithms have the exact some opinion of what something "looks like"?

No. The visual derivative is designed to be matchable by human inspection.

Even if that was not true, which it is, the poster’s claim would still be false, since the poster doesn’t have access to the source CSAM and therefore would not be able to produce the visual derivative regardless of whether I could visually inspect it.

Being able to see by inspection that they images don’t match CSAM is one of two independent ways in which the claim can be shown to be false.