I was talking about this with a friend the other day. I don't know about the technical feasibility (RE sybil attack[0]), but if it were possible, it would have a massive impact on the web. The current state of the art (in terms of new user signup) is using phone numbers as representing unique "trustable" people, which is kind of absurd.
This reminds me of how social security numbers weren't originally intended to be used as unique identification, but the demand for some form of identification was so strong that organisations ended up hackily using it anyway.[1]
This reminds me of how social security numbers weren't originally intended to be used as unique identification, but the demand for some form of identification was so strong that organisations ended up hackily using it anyway.[1]
[0] https://en.wikipedia.org/wiki/Sybil_attack
[1] https://www.youtube.com/watch?v=Erp8IAUouus