


Once you have set up security keys with your iCloud account, you will be required to use a security key to log in from untrusted devices. To ensure you have a backup, You need a minimum of two YubiKeys/security keys to get started.

1 This article will cover setting up and using your YubiKey with iCloud. By registering YubiKeys to your iCloud account, you significantly increase your protection even if your iCloud account password is stolen. Apple now supports YubiKeys to provide the strongest phishing resistant protection for your iCloud account using the FIDO protocol.
