technology

Develop a device that can use WiFi to see through walls


A team of researchers from the University of Waterloo has created a drone-powered device that can see through walls using grids WIFIThe drone-powered device detects security vulnerabilities WIFI.

The device can, labeled wi-peepto fly near a building and then use a net WIFI for the population to determine which devices are supported WIFI and quickly locate it.

use wi-peep A vulnerability that researchers call a network WIFI politeness, even if the network is password protected, smart devices will automatically respond to connection attempts from any device within range, and send wi-peep several messages to a device while it is in flight and then measures the response time on each device, enabling it to locate the device within a counter.

Dr. Ali Abedi, assistant professor of computer science at Waterloo, explains the importance of this discovery.

Obeidi said: “The devices wi-peep The lights are like in the visible spectrum, and the walls are like glass. Using similar technology, one can track the movements of security guards inside the bank by tracking the location of their phones or smartwatches. Similarly, a thief can determine the location and type of smart devices in the home, including security cameras and computers. Mobile devices and smart TVs, to find a good candidate for intrusion. In addition, operating the device via a drone means that it can be used quickly and remotely without much chance of user detection.”

While scientists discovered a security vulnerability in the network WIFI In the past, using bulky, expensive devices wi-peep Notable for its accessibility and portability, Abedi’s team built it using a store-bought drone and $20 in readily-bought hardware.

Abedi said: “Once a loophole was discovered WIFIWe realized that this type of attack was possible.”

And the team built wi-peep to test their theory and quickly realized that anyone with the appropriate experience could easily create a similar device.

“At the most basic level, we need to fix a network vulnerability,” Abedi said WIFI Politeness so our devices don’t respond to strangers, we hope our work can contribute to the design of next-generation protocols.”

In the meantime, chipset manufacturers urge WIFI It introduces a random variance into the response time of the device, which will make calculations like the ones it uses wi-peep Hugely inaccurate.

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