I agree with <a href="https://twitter.com/constmontague/status/1213309357204688899" rel="nofollow">https://twitter.com/constmontague/status/1213309357204688899</a><p>"... we need a new personal identifier, SSNs are all stolen at this point"<p>Though identity and authentication should be different things, as an identifier the only real problem with SSNs is that we should be using UUIDs instead.<p>The hard part is authentication, which should have a far more secure process than merely knowing 9 digits everyone (re)uses.