Earlier quoted context omitted.
Or we could (radical idea here) not use biometrics . I don't mean to be dismissive, but what advantage does this provide over opening a web site and hitting "pay" or maybe some sort of NFC tap? This looks like biometrics for the sake of being cool and flashy, which is not a trade-off I'm willing to make.
Here's an example which something like Amazon One can solve, but a card cannot: When I go to the grocery shop and I buy alcohol then I have to wait at the self checkout till until a member of staff comes to verify my age before I can pay for my shopping basket. That involves me showing them an ID (e.g. my driving license) and them having to verify my biometric (face) by looking at me and then looking at my driving li…
Why not do the same thing, but instead of verifying your palm you verify a device that's responsible for authenticating you? This could be a special phone app (like Singapore's SingPass[1]) or even a small card with a built-in fingerprint reader. Once you authenticate yourself to the device, it can attest to your identity and the transaction can be finished via NFC.
Seems like the best of both worlds - automate identity validation without a centralized biometric database.