[MayeulC]

I long wondered about this... How does card reading work?

Are regular smartcard readers compatible? Does the card have NFC for phones? Can you use them under Linux/mac? Do regular browsers work with it? (FIDO/webauthn).

Or is the card reader a standalone device, like my bank uses, where you key in your PIN, and it gives you a one-time code, or a response to a challenge?

[jve]

It's a smartcard. I have DELL Business class laptop with built-in smartcard reader. Otherwise you can get a compact device that reads smartcard chip. Some keyboards have card readers. https://m79.lv/arejiedatuneseji/atminaskarsulasitaji/id-smar...

No NFC. Don't think smartcards has anything to do with FIDO.

As for phones, there is an application that has to be setup using computer/smarcard reader and from then on, I can use app to authenticate & sign.