In April, Reddit lawyers sent formal legal demands to the University of Zurich, whose researchers used AI to impersonate actual users in an experiment on the powers of AI persuasion. And states across the US are considering or passing new laws that require internet companies to verify the ages of their users.As a result, there’s new urgency to find ways to verify some information about people online while also providing the privacy and anonymity that has become a cherished characteristic of the ...