Internet user-ID, AUS

Australia plans to require porn sites and antisocial media sites to check users' ages.

If the system truly did nothing other than determine whether the user's age is above or below N years, I would not object to it. However, such systems are likely to demand to see official ID records, which would identify the user as well as check per age, or take photos, which could be saved and used to identify the user. There are plans to implement a way to use GNU Taler to check ages. Just as Taker payments allow users to send a store payments that it can validate but cannot use to identify them, the same technique makes it possible for users to send a site a proof of age that it can validate but cannot use to identify them.