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by lazerl0rd 1385 days ago
Just a thought, but what if all citizens over the age of 18 could use TOTP [with a randomly-assigned secret] to verify their age. If they don't have a mobile device, they could purchase one of those "calculator-like" TOTP devices.

Sure, you could give yours to a friend but you could also scan a friend's face with the biometric suggestion or their ID with that suggestion. At least the TOTP suggestion would be quicker to verify, [can be] more privacy-friendly, and can be offloaded onto any devices (you already have one if you're going to need to verify yourself).