“FBI Agent Creates Anti-Tracking Tool for Surveillance Detection”
Date:15 Aug 2022
Category: Emerging Tech & Innovation
Security researcher Matt Edmondson has created a homemade anti-tracking device using a Raspberry Pi single-board computer. This gadget, costing around $200 in parts, aims to identify potential surveillance by scanning for nearby devices and flagging those seen repeatedly over a short period.
The system prioritizes mobility, as stationary use in places like cafes would trigger frequent false positives due to the surrounding devices. Built to fit in a shoebox-sized case, the device utilizes a Raspberry Pi 3 for processing, a Wi-Fi card for detection, and a touchscreen for displaying alerts. A portable charger keeps it powered, while a waterproof cover ensures protection.
Edmondson leverages Kismet, a wireless network detector, to identify nearby smartphones and tablets searching for Wi-Fi or Bluetooth connections. Kismet logs the initial detection time for each device. However, custom Python code by Edmondson analyzes these logs, creating lists of devices seen within specific timeframes (5-10 minutes, 10-15 minutes, etc.). If a device appears twice within these windows, an alert pops up on the screen, potentially indicating someone following you.
While the system can display a device’s MAC address, its usefulness is limited if randomized. It can, however, reveal names of Wi-Fi networks nearby devices are searching for. For instance, a phone looking for a “Langley Wi-Fi” network might offer a clue about its owner. Edmondson demonstrated this functionality by identifying a device searching for a “SAMSUNG SMART” network.
The device also features an “ignore” list to prevent false positives from your own phone or those of companions. Additionally, a “reset sightings” button allows clearing the device history. Edmondson envisions future upgrades like text message alerts instead of on-screen notifications and the ability to detect tire pressure monitoring systems to identify persistently close vehicles.
While Edmondson has no plans to commercialize the device, he emphasizes its replicability for anyone with basic technical knowledge. He believes the readily available components make it a feasible project for tech-savvy individuals.
