[notfed]

> But, I'll tell you that having someone show me a cell phone with my picture on it, nicely large and backlit and saying I'm 21, is a great solution to requiring people to present an ID that could come from one of 1000 places.

I agree, but I already have a California DMV app that does this. It doesn't need a ZKP.

> I'm failing to parse your argument here. We're talking about an example usecase of zkProofs as a way to better explain the technology.

Indeed my argument is that ZKP seems unnecessary in this example, and yes it's extremely hard for me to appreciate the usefulness of a ZKP with an example where it seems useless.

[latchkey]

> I agree, but I already have a California DMV app that does this. It doesn't need a ZKP.

What happens when you aren't in California? Or what happens when someone from outside of California comes to a bar.

> Indeed my argument is that ZKP seems unnecessary in this example, and yes it's extremely hard for me to appreciate the usefulness of a ZKP with an example where it seems useless.

Then go find better examples if you're this interested.