Zero-knowledge proofs are unworkable for age verification because they can't prevent use of somebody else's credentials.
The same argument could be said for other age verification methods. Nothing stops a kid from getting their older cousin to verify their identity for something and it will never be possible to prevent this.
alt Hacker News
The same argument could be said for other age verification methods. Nothing stops a kid from getting their older cousin to verify their identity for something and it will never be possible to prevent this.