Recent research has unveiled a concerning new method of surveillance that utilizes Wi-Fi signals to identify and track individuals—not through their electronic devices, but based on how their bodies interact with these signals. This technology is capable of pinpointing a specific person and tracking their movements within physical spaces as well as across various locations. While similar attempts have been made in the past, such as efforts in 2020 that achieved 75 percent accuracy, this new technology promises to surpass those limitations. The advantage of using Wi-Fi signals is significant; it can function in low-light conditions and can “see” through walls and other obstacles, making it a more effective identification tool compared to traditional surveillance cameras.
The potential implications of this technology are troubling, especially considering the widespread use of Wi-Fi in both public and private environments. For example, a seemingly benign use could involve a system that detects a customer’s return to a store and automatically texts them a coupon as a welcome back gesture. However, a more disturbing application could involve tracking individuals’ movements, including visits to private residences, if such Wi-Fi data were to be misused or sold. Currently, the WhoFi system is still in its proof-of-concept stage and relies on specialized software for implementation.
Interestingly, the technology was developed using basic hardware—two TP-Link N750 routers, which do not even incorporate the latest Wi-Fi advancements. As for any reassurance regarding its potential misuse, it is worth noting that the test conditions were not particularly rigorous. The study tracked only 14 individuals, each wearing a mix of clothing and gear. Achieving 95 percent accuracy with this limited sample may not hold up as evidence in a criminal trial, but it is certainly sufficient for tracking someone for potential law enforcement actions.