It was back in April this year that Google enabled Android devices running version 7.0 and up to effectively double as a physical security key for accessing Google services like Gmail. The company is now expanding the same ability to iOS. This means that an Android device can now be used as a physical two factor authentication security key to verify log-ins made on iOS devices.
When the feature was first launched in this year, it only worked with Windows 10, macOS, and Chrome OS devices. However, the process is a bit different on iOS compared to these devices. It doesn’t use Chrome to communicate with the device, it Android device will use the Smart Lock app from Google instead.