You are not required to accept anything other than digital ids. So from experience, whatever demands euid has will be what is required to identify you.
There are attempts make it almost mandatory through mandatory age verification. Which would mean that you'd have to submit to privacy violations or be cut off from a sizeable portion of the internet.
I wonder if there will be a big enough market for a very compact smartphone equivalent device that can be used just for credentials? A device that is offline on standby except when you need it. Perhaps the size of a car key.
What if it was the size of a credit card and it had stuff like your name, date of birth and even a picture of your face. I want to name this invention an ID card…
And if you added a cryptographic layer to it, with your own private key baked into it, you could both sign the documents, confirm your identity and the government could confirm it's actually you....
....wow, that would be reinventing the existing model of the leading ID cards....
If it can go online, I'd prefer to use an android work (or user) profile with only auth apps in it, and nothing else.
As a separate device, it should be offline always IMO, and perhaps the size of a passkey. Or one of those banking devices with a display that show an authenticated text saying what you are confirming.
Essential services (banks, government services, public transport) generally still support SMS as an alternative to their mobile apps when there's no completely offline process.
Perhaps you won't be able to exist in private without a smart phone. Or there will be some technology beyond a smartphone that you can't exist without.
