A silicon carbide semiconductor device includes a substrate and a junction field effect transistor. The digital signature may be secure hash algorithm hash values. A second embodiment incorporates an extending cushion that can be moved between the extended and retracted positions by an extending arm. The door is in the open position only after the door pivots sufficiently to move the first and second surface portions fully out of the opening, whereby birds, animals, and the like are restricted from entering the conduit. A buried diffusion region abuts the bottom of the floating gate.