In Norway the banks started using 2F in the late 90s I think. I remember sheets of paper with codes that were only used once. Each action (login or transfer) wo

In Norway the banks started using 2F in the late 90s I think. I remember sheets of paper with codes that were only used once. Each action (login or transfer) would prompt for a specific number that had to be entered. Fortunately they changed to electronic tokens in the early 2000s