To the surprise of many, Google recently announced it is already integrating ZK-proof-of-age into Google Wallet with those kinds of properties, open sourcing the underlying libraries, and working with governments to encourage their ZKP system's adoption for exactly this sort of problem.

- [2025-04-29] https://blog.google/products/google-pay/google-wallet-age-id...

- [2025-07-03] https://blog.google/technology/safety-security/opening-up-ze...

- [2025-06-11] https://zeroknowledge.fm/podcast/363/