Could social media be protected from flood of artificial identities and give users anonymity on the same time? Sure, but we need special protocol for it.Universal Anon CounterProtocol need to be independent of specific provider. It could be achieved by pure mathematical approach: creating proof for pair - identity, service. So when website want to serve only real people, data from provider and service is combined and person generate ZK proof by running algorithms on local machine But Proof of...