Comment on Under-16s to be banned from social media, Starmer announcesparentComments−mrob2moZero knowledge proofs are unusable for age verification because they're impossible to revoke. One person can share their ID and everyone else can use it.−orwin2moIf your country has a digital ID, it is possible.−mrob2moIf it's possible to revoke then by definition it's not zero knowledge. Revocation status is knowledge.−orwin2moSorry, i wasn't clear. If you have digital ID, you can emit time-limited certificates.
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Zero knowledge proofs are unusable for age verification because they're impossible to revoke. One person can share their ID and everyone else can use it.
If your country has a digital ID, it is possible.
If it's possible to revoke then by definition it's not zero knowledge. Revocation status is knowledge.
Sorry, i wasn't clear. If you have digital ID, you can emit time-limited certificates.