Researchers have found that Wi-Fi signals can be used to identify humans and monitor what they are doing. By noting how the radio signals are deformed by peoples’ activities, software can “see” what a person is typing, or even read their lips with surprising accuracy.
Just thought you might like to know. And the skeptics among us figured the football coaches held those play cards in front of their faces just for show and fun.
What next? Faraday cages around the entire bench area? Oh! Wait. Just a simple light weight tin foil helmet, with face mask, should do for the coach.
From the reaches,