Modded Wireless Network Can See Through Walls, but Can’t Save the World Just Yet

Posted 10/01/2009 at 5:20pm | by Jason Barry

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The folks over at the University of Utah are working on using wireless networking equipment to see through walls. Yep, they are trying to turn your wifi network into an investigative x-ray machine.

Well, it is slightly more complicated than that. They set up a 34-node wireless network and used principals similar to sonar to aggregate the movement of objects behind physical objects. You can practically hear the excitement from all the spy-happy teenagers. Joey Wilson and Neal Patwari’s intentions were much more altruistic.

“We envision a building imaging scenario similar to the following. Emergency responders, military forces, or police arrive at a scene where entry into a building is potentially dangerous. They deploy radio sensors around (and potentially on top of) the building area, either by throwing or launching them, or dropping them while moving around the building. The nodes immediately form a network and self-localize, perhaps using information about the size and shape of the building from a database (eg Google maps) and some known-location coordinates (eg using GPS). Then, nodes begin to transmit, making signal strength measurements on links which cross the building or area of interest. The received signal strength measurements of each link are transmitted back to a base station and used to estimate the positions of moving people and objects within the building.”

Obviously, privacy is a concern. But let’s face it, you’ve got nothing to hide so long as you aren’t a terrorist, hostage wrangler, or scantily clad getting out of the shower.