It would nice to be able to have a provably private system for something like this. Proof of identity, or proof of personhood, or whatever you want to call it i

It would nice to be able to have a provably private system for something like this. Proof of identity, or proof of personhood, or whatever you want to call it is going to be a foundational element of online trust in the coming years. As a forum or community, I want the ability to ban a troll without them coming back under a different pseudonym. But at the same time, I don't want to post under my real name, or even something that can be linked back to me. So you ideally should be able to have multiple pseudonymous identities that can't be linked together by a 3rd party, but also have the ability to block the "root" identity, even if you only know the pseudonym.