BLACK HAT 2015: IOT DEVICES CAN BECOME TRANSMITTERS TO STEAL DATA
By rapidly turning on and off the outputs from I/O pins on chips within the printer, it’s possible to generate a signal strong enough to pass through a concrete wall and beyond to a receiver, says Ang Cui, a researcher who works at Red Balloon Security and did the research at Columbia University.
The signal was sent down the printer cable connected to the pins that was long enough to serve as an effective antenna. He called the resultant system Funtenna.