Denmark Authentication Methods - RUB-NDS/FutureTrust GitHub Wiki

In Denmark, each user receives a smartcard containing one-time-use transaction authentication numbers. After entering the username and password, the user is additionally prompted to enter a key corresponding to a number as part of the two-factor authentication.

All one-time-use keys are stored centrally on a server. If a user consumed all stored keys on the smartcard, the user receives a new smartcard with new keys via mail.