[erwinmatijsen]

IRMA [1] comes to mind. From their site:

With IRMA it is easy to log in and make yourself known, by disclosing only relevant attributes of yourself. For instance, in order to watch a certain movie online, you prove that you are older than 16, and nothing else.

Their docs[2] are pretty good.

[1] https://irma.app/?lang=en [2] https://irma.app/docs/what-is-irma/

[O__________O]

Thanks, agree system provides privacy protecting attribute verification (age, legal-voter, citizen, income, etc) — but after quickly reviewing it, does not appear to support anonymously doing so in a way that only the user knows their identity and the endpoint identity — but neither the endpoint or government know both, even if they or an attacker have access to the security tokens from the endpoint and governments servers.

Did I miss something?

Another user suggested Privacy Pass system, which I have reviewed before and currently reviewing to see if it fits system profile I am describing:

https://news.ycombinator.com/item?id=33133758

[akira2501]

You just have to be comfortable with a single application on your phone holding all your details for you, it having implemented the protocol perfectly, and having amazing protections around the handling of the third-party request phases.

And this is all to improve the privacy of children?