It's currently in the form of an add-on that our 'beloved' Google chrome offers. It's called "typeDNA" and it will very soon replace 2 step verification for secure logins all around the internet. This add-on employs biometrics and studies typing patterns to verify your identity. Instead of having to pull out your phone to verify a login, this will obselete that act.
First, you type your password as normally do, then your keystrokes are analysed. Basically taking into account how fast you type, the pauses, patterns, etc that are in the completion of you entering your password. This information is then uploaded to a central database and a typing profile is formed for you. This biometric software then compares password attempts to the original and employs margin of error, which of course you can loosen or tighten. There is also a failsafe in case you happen to break a finger. They say this an 'elective' add-on, but it's very probable that a database already exists with your typing dynamics documented. You already know there are databases with your facial structure backboning "FRS" or facial recognition technology.
Here is the website.
https://www.typingdna.com/
