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You don't update that property unless there would be a need to prove the age was above some other number. Otherwise I think you're on the right track. As you sa
by NovemberWhiskey 4y ago
You don't update that property unless there would be a need to prove the age was above some other number. Otherwise I think you're on the right track. As you said, you'd update it when you turned 18 or 21 etc.
In the US, 21 is the "prove you can buy liquor" age and there's seldom a need to prove anything higher, outside of some unusual cases like becoming a member of Congress or President or something. No-one cares if you're 22 or 24 or 43.
- lxgr 4y agoThe DMV (or whoever issues widely accepted identity documents in your country) could also provide a service that can exchange precise assertions to more private ones, i.e. one that allows the following transaction: You provide a document stating that "Mr. Foo Bar is depicted on this photo and was born on 1990-04-01" signed by them, and get one that just says "the person depicted on this photo is over 18/21", also signed by them. This would save you a trip to the issuer.
- NovemberWhiskey 4y agoRight - that's the "drinker's permit" concept I'm talking about here: https://news.ycombinator.com/item?id=33430005 https://news.ycombinator.com/item?id=33430005
- dwaite 4y agoFor mobile drivers licenses in ISO 18013-5, the credential is a signed list of salted hashes, each representing a distinct named attribute. You release the credential as well as whatever attributes which were requested. You can disclose your full name and your birth date, or just the boolean value that you are over 21, depending on the use case. Of course, many of these scenarios would be more logically served with a digital version of a national ID card or passport, but some countries use driving licenses in lieu of such concepts.