Wi-Fi vulnerability allows you to "look" through the wall

Engineers from the University of Waterloo have developed a drone-based Wi-Peep device that can monitor

people inside the house.It flies near a building and uses Wi-Fi networks to identify and locate all wireless-enabled devices indoors in seconds.

Wi-Peep exploits a loophole that researcherscalled "polite Wi-Fi". Even if the network is password protected, smart devices will automatically respond to contact attempts from any device within range. Wi-Peep sends multiple messages to a device during a flight and then measures the response time for each message, allowing the device to be located within a meter.

How Wi-Peep works. Image: Ali Abedi, Deepak Vasisht, MobiCom ’22: Proceedings of the 28th Annual International Conference on Mobile Computing And Networking

The ability to use Wi-Fi for surveillance is notnew, scientists say. But previous developments required expensive devices and were not available to the average buyer. Wi-Peep engineers assembled using a regular drone bought from a store and additional equipment for $20.

The researchers created Wi-Peep to test for the vulnerability and availability of the technology. The results showed that anyone with the right experience could easily create such a device.

Using similar technology, you cantrack the movements of security guards inside the bank by monitoring the location of their phones or smart watches. Similarly, a thief can determine the location and type of smart devices in a home, including CCTV cameras, laptops and smart TVs, to find a suitable candidate for hacking.

Ali Abedi, study co-author

Scientists are calling on wireless network equipment manufacturers to randomize response times until the vulnerability is fixed globally.

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