Having done some experiments last year with an RTL-SDR 433 and SRH-789 antenna to get the RF signal from the weather station of a  neighboring roof (it worked!) I am addicted now to the invisible world around me.

So I came across this week to a new paper that shows how

IoT devices and other embedded systems are increasingly equipped with cameras that can sense critical information in private spaces. The data security of these cameras, however, has hardly been scrutinized from the hardware design perspective.

The RTL SDR website has some worrying real-time decoding of what IP cameras are capable of.