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Wireless Network Modded To See Through Walls
KentuckyFC writes "The way radio signals vary in a wireless network can reveal the movement of people behind closed doors, say researchers who have developed a technique called variance-based radio tomographic imaging which processes wireless signals to peer through walls. They've tested the idea with a 34-node wireless network using the IEEE 802.15.4 wireless protocol (the personal area network protocol employed by home automation services such as ZigBee). The researchers say that such a network could be easily distributed by the police or military wanting to determine what's going on inside a building. But such a network, which uses cheap off-the-shelf components, might also be easily deployed by your neighbor or anybody else wanting to monitor movements in your home."
wanting to determine what's going on inside a building.
Now when teens want to sneak out at night, they can easily see thru walls if their parents are sleeping!
Went straight for the "everyone is spying on me!" ploy a little quick there. Seriously, if anything my neighbors request to see LESS of my movements. This may be due to the fact that I have a clear shower curtain and my bathroom doors lines up to a big bay window facing the road...took me two months to realize that one.
Looks like it is time to get hold of some Aluminum Oxide paint.
What with three wireless hubs, an RFID scanner, and half-a-dozen Bluetooth devices always on, I'm pretty sure I'm already casting EMF shadows on my walls.
Been seeing some really big spiders, too...
Orwell: "In a Time of Universal Deceit, telling the Truth is a Revolutionary Act"
Terribly thin floors & cielings mean that I can monitor where my upstairs neighbor is and what he is doing at all times.
Of course my neighbors can monitor when I have sex and how good it is, but I kind of get off on that anyway...
Investigative reporter Seymour Hersh said that the U.S. military had developed a secret new technology for use in urban warfare. He said the technology was revolutionary, equivalent to the first time tanks were deployed on the battlefield. From what I remember, there was speculation that Hersh had learned that the military could now see through walls.
Up, down, up, down, what the heck are they doing?
You can get xbee-equipped computers (mostly with pics, avrs, basic stamps, etc) for super cheap, like three for a bill. I'm considering them for a remote monitoring and control application where wifi is overkill in some ways and inadequate in others (line of sight issues.) Current xbee modules all seem to support mesh networking, which is really the big draw to me of the protocol itself here, or at least the most readily available implementation. Being able to put out a sensor net and get a sort of meta-sense out of it would be all the more exciting. I'm sure the same thought has occurred to everyone, of course. This seems like the kind of thing that would give the [para]military types a massive hard-on given that they're already playing with the idea of gigantic numbers of drones and communications devices scattered across the battlefields of tomorrow... and our homes and cities.
"You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
Which means they'll want WiFi access on the porch, the back yard - the patio and the sundeck.
I think you mean the front observation deck, the firing range, and the snipers nest.
Finally had enough. Come see us over at https://soylentnews.org/
by "interrogating" this volume of space with many signals, picked up by multiple receivers, it is possible to build up a picture of the movement within it.
As I understand, the researchers used 34 receivers. You will need a whole lot of receivers. More than you might want to buy and maintain to offer you what is at best a poor resolution of moving things beyond walls.
The image in the article isn't really good. If you want to see a demonstration of what they did in real time, it's here.
Maybe he only showers every two months?
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Check out their demonstration videos at http://span.ece.utah.edu/radio-tomographic-imaging.
I was fortunate enough to see the demo at Mobicom last year. It's a really neat application, even if the math is nothing new.
However, this isn't radar, it's tomography. Radio tomography. And the innovation isn't radio tomography, it's using stock WiFi hardware to do it, but I suspect you already knew that.
... wherein the Supreme Court (including Scalia, amazingly) held that peering into homes using equipment that was not available in common use by the layperson was within the bounds of the 4th amendment, and therefore requires a search warrant.
The trick is to imagine the poster as a hot 19 year old chick, who refers to herself as a guy because she's a lesbian.
Is 1563649 a prime number?