I am Comp-sci student doing a software engineering paper about designing a program, planning the software like you were actually planning a real-life software project, short of writing actual pseudo-code or code. For my project, I picked doing an app that can detect a physical man in the middle attack. Like monitoring for a tap on the line.
It got me thinking, can you monitor for someone catching wireless communication? Like the latest WEP2 hack. If someone were monitoring your wireless traffic passively to capture your secure handshake, could you detect them snooping wirelessly without them transmitting packets?
My knowledge of EE stops at MOSFETs and timing of electrical currents through logic gates and metastable currents propagating through circuits because the timing of logic gate was off. My knowledge of EE certainly falls short of radio broadcasting. So I am not even sure if such a feat is possible, I suspect it isn't but it's out of my ken.
I suspect if you were close enough a receiver would leave behind some kind of detectable EM footprint.