Comment by brabel
3 hours ago
Most countries in the EU already have widely accepted identity proof apps mostly verified by the banks or the government itself. Once verified the identity app gets a certificate which is signed by the authority which issues the identity. We all know how that works as that’s how TLS works as well. The zero proof age check is based on verifiable credentials and the related verifiable presentation. Once you have a wallet with your identity it’s not hard to issue cryptographic proofs of some properties of your credentials, and age is a property of your identity credentials basically. To learn more about the technical details, search for the specifications I mentioned above: verifiable credentials, verifiable presentations.
Ah, and the sites (or whatever else) can then verify the key is valid locally? Assuming that is the case, that'd make for a surprisingly nice system, further assuming that the produced credential is not reversible. I'm highly cynical and so I expected it to be a backdoor for surveillance as it feels like most things under the pretext of 'won't anybody think about the children' are.