[jrek]

Apple is not using PhotoDNA, but in any event - this is a good article but they misconstrued the '1 in a trillion' quote, as is canvassed in the comments for the article itself. According to apple there is a 1 in a trillion chance of wrongly flagging an account, not a 1 in a trillion false positive rate for individual images, and we know that step to banning include: - multiple flagged images; and - human review

The details for those processes hasn't been fully disclosed, and it isn't possible to say whether 1 in a trillion is a reasonable estimate or otherwise.

[stickfigure]

I don't want my private pictures reviewed by humans. What's the probability of that?

[formerly_proven]

"Don't worry, even if the system flags your baby pictures, we'll just hand them to the lowest-bidding subcontractor who will review the pictures of your naked baby (you know, to catch pedophiles!) and then probably not report you to the authorities. If this happens too often we're just going to ban you tho, this process costs money y'know?"