Researchers at the University of Utah have found a way to see through walls to detect movement inside a building.The surveillance technique is called variance-based radio tomographic imaging and works by visualizing variations in radio waves as they travel to nodes in a wireless network. A person moving inside a building will cause the waves to vary in that location, the researchers found, allowing an observer to map their position...
Of course there are privacy and security concerns associated with the technology. A burglar could use it to detect if anyone is home or to scout the location of security guards. (more)
This technology is a cousin to our Digital Surveillance Location Analysis™. We use it to detect and pinpoint the locations of rogue computers, unauthorized Wi-Fi hot spots and digital GSM wireless bugs. (more)
