Google recently updated its Smart Lock app for iPhones that can now turn your iOS device into a physical security key. The app stores your private keys in the iPhone’s secure enclave, a separate processor inside modern iPhones that handles biometric information such as your fingerprint, Face ID, and other cryptographic data. Android users have had this feature on their smartphones since last year, but now Apple product owners can also use this advanced, phishing-resistant form of authentication as an alternative to a physical key.
Source: https://thehackernews.com/2020/01/google-iphone-security-key.html