Wi-Fi signals can now trace your location even within walls, without needing cameras or phones – here's the method behind it.
In a groundbreaking development, researchers at La Sapienza University of Rome have unveiled a new system called WhoFi. This innovative technology uses Wi-Fi signals for covert tracking and surveillance, analysing how a person's unique body disrupts these signals as they move through a Wi-Fi-covered area.
The system leverages existing Wi-Fi Channel State Information (CSI)—which captures amplitude and phase changes in Wi-Fi signals—to identify and re-identify people with about 95.5% accuracy, without requiring any device to be carried or visual data like cameras.
WhoFi works by analysing changes in wireless signals caused by people's size, shape, and movement. The system applies a deep neural network to the CSI data, extracting unique signal distortion patterns caused by an individual's body shape and movements. This creates a unique data signature, allowing the system to recognise the same person across different locations and times without needing visual cues or physical interaction.
The implications of this capability are significant. While WhoFi could be beneficial for smart environments that adapt to the presence of specific individuals, or for health monitoring that tracks movement patterns, it also raises privacy concerns. The technology enables persistent tracking and re-identification of individuals in public or private spaces without alerting them or requiring their permission. This covert surveillance blurs traditional boundaries, as it does not generate visible data like video but can still identify and monitor people.
It's important to note that WhoFi does not collect biometric data directly. However, without strict guidelines, the technology could be misused for secret monitoring in homes, workplaces, or public spaces.
Himani Jha, a tech news writer with a five-year experience in contributing to leading publications, delves into the intricacies of WhoFi. In her latest piece, she explores the potential benefits and risks associated with this new technology.
When not immersed in gadgets, Himani Jha enjoys exploring the vibrant culinary scene, discovering new cafes and restaurants, and indulging in her love for fine literature and timeless music. With a passion for smartphones and consumer technology, Himani brings a unique perspective to her writing.
At present, WhoFi is in research labs and is not available commercially. As Wi-Fi networks become more widespread, the potential for the deployment of WhoFi increases. However, the future of this technology lies in the hands of policymakers and the public, who must grapple with the balance between convenience and privacy in an increasingly connected world.
References: [1] [Research Paper Link] [2] [Research Paper Link] [3] [Research Paper Link] [4] [News Article Link]
- In the ever-evolving landscape of technology, WhoFi, a groundbreaking system developed by researchers at La Sapienza University of Rome, leverages data-and-cloud-computing and smartphones' Wi-Fi connectivity to identify individuals with remarkable accuracy.
- As we delve deeper into the era of data-and-cloud-computing, the potential for technology advancements like WhoFi, which could revolutionize smart environments and health monitoring while raising privacy concerns, demands careful consideration and strict policy guidelines to ensure our privacy in an increasingly connected world.
