Mobile YubiKey 5 NFC from Yubico, is a hardware key that uses Near Field Communications (NFC) technology to wirelessly communicate with supported iOS and Android mobile devices. This method of multi-factor authentication (MFA) is particularly useful on mobile devices.
When you select Mobile YubiKey for MFA, you will download and install the ID.me Authenticator app, then associate your YubiKey hardware with your ID.me account, then use your YubiKey for secure sign-in.