In both your examples the government service has your full identity, then pinky promises to forget it.
It can be like buying alcohol in a store. They look at you and see your age. Or if it’s unclear, the store clerk asks your idea and promptly forgets all about it. Except you’re not buying alcohol but a login for some age verifier.
It can be like buying alcohol in a store. They look at you and see your age. Or if it’s unclear, the store clerk asks your idea and promptly forgets all about it. Except you’re not buying alcohol but a login for some age verifier.
So yes, they get your identity, then promise to forget it.
That’s a worst of both worlds proposal: it makes it trivial to deanonymise people, and it doesn’t solve the replay attacks.
Maybe buying alcohol works differently where you live.
They ask for ID card indeed, making it super easy to just make a copy. On top of that, your payment details are stored. You’re on camera. Etc.
Super easy to automate deanonymization. (1).