WiFi networks are omnipresent in our environment, they are almost everywhere, because they are the most practical way to connect to the Internet. This not only has advantages, there may be unknown effects on our health, but also for privacy.
Researchers at the University of California, Santa Barbara, have found a way tosee through walls. To do this, you just need a WiFi network, a smartphone and an application to seewhether a place is occupied or not. Explanations!
These researchers determined that it is possible to know if a house or office is occupied from the outside. All you have to do is analyze Wi-Fi waves, using a smartphone and an app.
They explain the approach used, where it is necessary to measure changes inWiFi signal strength. This variesdepending on the movementspeople walking inside a building or room.
The researchers created an app that uses the accelerometer to record movements and analyzes changes in signal strength.
This allows you to obtain the position of the WiFi transmitter, but also and above all to know if people are present in a building or room.
If the WiFi signal is constant, then there is no one there, but any movement changes the signal which can then be measured to know where the person is.
The experience of these researchers shows that the presence of Wi-Fi networks is a potential privacy risk. Fortunately this method is not publicly available, as it could be used for bad purposes.
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By : Keleops AG
Deputy editor-in-chief, also known under the pseudonym Teza. Former video games journalist, who has been immersed in tech and Apple products since his very first iPhone 3GS in 2009. He has since worked for several American tech sites and now for iPhon.fr. Incidentally YouTuber and Apple product specialist on the MobileAddict channel. To contact me: maxime[a]iphon.fr
