Thank you for the purely informational post and I'm currently reading through the second just to understand this more thoroughly but I can say already screw the proofs. Apple needs to stay off my devices with their crime scanning bs. It doesn't matter if this whole scheme ensures that Apple cryptographically keeps their hands clean. The effect is the same. They're on my device looking for things that can send me to jail.

These brilliant academics just don't care so long as they can publish an interesting paper I guess. Whatever, still reading.