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WiFi routers can see people through walls. Here’s how it works (www.zmescience.com)

submitted 2 years ago* (last edited 2 years ago) by pineapplelover@lemm.ee to c/infosec@infosec.pub

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cross-posted from: https://lemmy.kevitprojects.com/post/8452

What do you guys think about this?

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[–] icerunner@lemmy.ml 6 points 2 years ago (1 children)

Hmm. I'm sure it will only be used for legitimate and honest purposes by well-meaning people.

[–] alex_02@infosec.pub 6 points 2 years ago

I read about this a while ago when I was trying to see if I could build a device to see/hear through walls. It's possible just hidden behind a lot of beauracicy/acadamia bs.

[–] kismetwireless@infosec.pub 2 points 2 years ago

Some consumer wifi company - linksys eero possibly? - some years ago was rolling out a home security feature which used signal differences in the mesh links to detect movement in the house. Not quite 1:1 with mapping, but similar.

There's been a bunch of "wifi as passive radar" in academic stuff for 10+ years, but w/out the modern image recognition stuff to boost it; most of if lacked public attention due to either academic paywalls or the difficulty of obtaining SDR gear in any affordable way at the time.

[–] OppositeOfOxymoron@infosec.pub 1 points 2 years ago

There are old household alarm systems based on this tech from the 70's. I think there were two components - VHF transmitters, and a receiver -- and if the receiver detected an change in the receiving pattern, it was because something moved between a transmitter and the receiver, and it would trigger.

Fuck I'm old.