Authenticator's supproted method to communicate to FIDO user device.
public enum AuthenticatorAttachmentHint
Authenticator is able to communicate by Bluetooth to the FIDO User Device.
Authenticator is removable or remote from the FIDO User Device.
Authenticator is permanently attached to the FIDO User Device.
Authenticator is able to communicate by NFC to the FIDO User Device.
Authenticator is connected to the FIDO User Device ver a non-exclusive network (e.g. over a TCP/IP LAN or WAN, as opposed to a PAN or point-to-point connection).
The external authenticator is in a "ready" state.
The external authenticator is able to communicate using WiFi Direct with the FIDO User Device.
The external authenticator currently has an exclusive wired connection.
The external authenticator communicates with the FIDO User Device through wireless means.