It sounds to me as if he's probably thinking of something like this, rather than backdoors.
https://www.theengineer.co.uk/issues/october-digital-edition-2/radio-beam-device-can-disable-car-and-boat-engines-from-50m/
It sounds to me as if he's probably thinking of something like this, rather than backdoors.
https://www.theengineer.co.uk/issues/october-digital-edition-2/radio-beam-device-can-disable-car-and-boat-engines-from-50m/