“Now supports NFC, USB, and Lightning FIDO2-compliant security keys in Safari, SFSafariViewController, and ASWebAuthenticationSession using the WebAuthn standard, on devices with the necessary hardware capabilities,” states the release note. This means that with iOS 13.3, the Safari browser on your iPhone will support physical security keys such as Lightning-equipped YubiKey.
What is a physical security key and how does it affect you?
For starters, physical security keys are a piece of hardware that can be plugged to your PC (and soon iPhone) to authenticate the user. This is considered to be a more secure way of authenticating a user than 2FA (Two-factor authentication) method that is currently used in most places. With Safari browser supporting this key, you can plug in the device and log in to different services and apps. The support has already been there on Safari for Mac ever since the arrival of macOS Catalina in September.
There is no word on when exactly Apple plans to release its iOS 13.3 to all the users.
Apple’s Safari web browser, however, the last major one to support physical security keys. Others like Google Chrome, Mozilla Firefox, Opera, Microsoft Edge, all have support for security keys.