I think the solution to this is going to end up looking a lot like a national ID card with a cross-reference online. To 'sign in' somewhere, a machine scans th

I think the solution to this is going to end up looking a lot like a national ID card with a cross-reference online. To 'sign in' somewhere, a machine scans the card, cross-references the data the card is claiming with the face and a national ID database. Might also list public employment / contract records of relevance (like, carrier, emergency services, etc). This would also let someone sign in to a common area and sub-select a portion of the local ACL to allow access to a locker for stuff. The current attempts at such systems are clumsy, expensive, and insane due to the lack of such public infrastructure. The mechanical versions all invariably also involve that same level of public (or at least to local private entities with cameras) exposure. Yes, there should also be regulations related to such a system. I don't mind it being used in the EXACT and pre-determined authentication method outlined but /abusing/ it or /caching/ data in ways that break down anonymity shouldn't be allowed.