Safari gets support for hardware security keys with iOS 13.3
https://thenextweb.com/security/2019/11/13/safari-gets-support-for-hardware-security-keys-with-ios-13-3/
Apple yesterday released iOS 13.3 beta to developers and public beta testers. But it comes with a new nifty feature that allows Safari users to use hardware security keys for two-factor authentication.
According to the release notes:
