From last year it was possible to use any Android phone with Android 7 or higher as a security key for two Google account authentication features. This is great progress in security and from now on most of the iPhone joins them, which can be used to sign in safely on nearby devices.
What is 2FA authorization and how to use it with Google Smart Lock
Two-factor authentication means that in addition to entering a user name and password when you sign in, it needs an extra entry point that confirms you are the right person
Specifically, the two-factor validation does Use the second device managed by the account user to confirm login
In the case of Google and thanks to its Google Smart Lock program, users when starting a new season can Verify in 2FA by opening the app on iPhone and confirming login
To start using this new feature we have to update the Google Smart Lock app to be published 1.6 It is currently running when you sign in to Chrome on computers near the iPhone. Application use the iOS Safe Enclave safeguarding data and preventing unwanted access.
Via | 9to5google