If you're not impressed by the perceptual hash, then you should at least be impressed by their implementation of the private set intersection. That's something

If you're not impressed by the perceptual hash, then you should at least be impressed by their implementation of the private set intersection. That's something that not a lot of companies could pull off. It doesn't make the whole system any less fundamentally flawed, but I think the technical "Wow!" factor certainly helped many people be OK with it. In this view, the shiny new PSI system is a trojan horse for the totally unaccountable and opaque hash set that they've feeding into it.