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by zimmerfrei 2855 days ago
You have just described IRMA (I Reveal My Attributes) which is an experimental non-profit implementation of a subset of Idemix, a type of ABC (attribute-based credentials) system:

https://privacybydesign.foundation/irma-en/

https://privacybydesign.foundation/irma-explanation/

https://petsymposium.org/2017/papers/hotpets/irma-hotpets.pd...

edit: links