Security keys
Is the fingerprint considered a security key?
iPhone SE, iOS 16
No, it is a special piece of hardware. In addition a finderprint is normally part of Touch ID which is the equivalent to entering a passcode. A Security Key is a different level of security normally used when you sign in on a new piece of hardware. As such it is not frequently used, vs. Touch ID which might be used several times per day (and has not been supplanted in most devices by Face ID).
About Security Keys for Apple ID - Apple Support
- A security key can act as the second piece of information, instead of the six-digit verification code that is normally used.
- Because you use a physical key instead of the six-digit code, security keys strengthen the two-factor authentication process and help prevent your second authentication factor from being intercepted or requested by an attacker.