Bridging an air gap could also be possible by simply producing a device that looks to x-ray to be a capacitor but is crafted of materials specifically selected for their ability to physically change in some dimension that the attacker is able to measure remotely.
Change physical size when charged/discharged, measure sound pressure via lasers on windows or microwaves sensing cavities in concrete walls.
The victim doesn’t even need to be specifically targeted if they use commodity components whose design is known. Just arrange for the company producing parts to select a specific recipe.
Change physical size when charged/discharged, measure sound pressure via lasers on windows or microwaves sensing cavities in concrete walls.
The victim doesn’t even need to be specifically targeted if they use commodity components whose design is known. Just arrange for the company producing parts to select a specific recipe.