Physical key support is designed to help prevent phishing scams, which can trick users into allowing an intruder access through 2FA. Using a device like the YubiKey ensures that only those with access to the physical key can gain access to the user’s account. While some security keys plug into the iPhone’s Lightning port, most use USB. However, NFC and Bluetooth keys should also work with the iPhone, and users can plug in a USB key using Apple’s Lightning to USB 3 Camera Adapter.
