On: Getting a biometric security key right

[_bz2r]

Serious question that sounds dumb: what happens if you lose your finger?

[hashworks → _bz2r]

The worst case would be loosing the whole YubiKey. In that case you need some backups to access your accounts, for example another YubiKey.

[remus → _bz2r]

From the article, there's a backup PIN.