Fair, maybe remove the question altogether, and have dedicated GOV endpoints for specific attestations?

While that’s true from a technical perspective…

How/where do you keep the certificate? If you either need an app for it, or need to manually install it on your device, most users would probably be out. The benefit of my suggestion is that you need absolutely nothing except a way to authenticate with GOV.

2. is a Problem with all of these, that’s for sure.

I fjnt get the part about the info service tbh

As long as your browser saves an auth token or something for GOV somewhere, all of that can happen without user interaction.

I think that at the bare minumum, the PORN<->GOV connection must not occur. How about this (simplified):

• USER visits porn site
• PORN site encrypts random nonce + “is this user 18?” with GOV pubkey
• PORN forwards that to USER
• USER forwards that to GOV, together with something authenticating themselves (need to have GOV account)
• GOV knows user is requesting, but not what for
• GOV checks: is user 18?, concats answer with random nonce from PORN, hashes that with known algo, signs the entire thing with its private signing key
• GOV returns that to USER
• USER forwards that to PORN
• PORN is able to verify that whoever made the request to visit PORN is verified as older than 18 by singing key holder / GOV, by checking certificate chain, and gets freshness guarantee from random nonce
• but PORN does not know anything about the user

There’s probably glaring issues with this, this is just from the top of my head to solve the problem of “GOV should know nothing”.

Not sure. How about this (simplified):

• USER visits porn site
• PORN site encrypts random nonce + “is this user 18?” with GOV pubkey
• PORN forwards that to USER
• USER forwards that to GOV, together with something authenticating themselves (need to have GOV account)
• GOV knows user is requesting, but not what for
• GOV checks: is user 18?, concats answer with random nonce from PORN, hashes that with known algo, signs the entire thing with its private signing key
• GOV returns that to USER
• USER forwards that to PORN
• PORN is able to verify that whoever made the request to visit PORN is verified as older than 18 by singing key holder / GOV, by checking certificate chain, and gets freshness guarantee from random nonce
• but PORN does not know anything about the user

There’s probably glaring issues with this, this is just from the top of my head to solve the problem of “GOV should know nothing”.

Mozzarella (talking about the balls of fresh mozzarella you get sealed in with their brine).

Can’t do store brand anymore after having tried Galbani.