Thanks to a chip inside that contains codes and protocols, each one of these physical keys can connect to online servers to verify that you are the person accessing whatever device you've plugged it into. Some are so small that they barely stick out when plugged into a laptop. To use security keys, first set up your watch with your own iPhone.Security keys look like small USB drives and can be plugged into a wide collection of devices. Apple Watches that are paired with a family member's iPhone aren't supported.Child accounts and managed Apple IDs aren't supported.You can't sign in to older devices that can't update to a software version that supports security keys.You won't be able to sign in to iCloud for Windows.There are a number of limitations though that you need to be aware of if you do set up security keys on your Apple ID. To sign in on an Apple Watch, Apple TV, or HomePod after configuring your security keys, you'll need an iPad or iPhone that supports security keys.

Note that the latest nightly build of Firefox, Firefox 109, does not support the security key standard that Apple uses. Two-factor authentication set up for your Apple ID.iOS 16.3, iPadOS 16.3, macOS Ventura 13.2 on all devices that are signed in to your Apple ID.At least two physical FIDO Certified keys with CTAP2 support.You'll need the following to set up a security key with your Apple ID. While Apple doesn't say, user reports suggest that the FIDO protocol being used is the Client to Authenticator Protocol 2, or CTAP2. Setting up security keys for your Apple ID

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