Drone Path Often Reveals Operators Location

The threat posed by drones to critical infrastructure and other operational technology is made more serious by the inability of law enforcement to locate operators, researchers say.

The way that a drone moves and its path through the sky can reveal the location of the operator, a critical step in preventing drone attacks on critical infrastructure and other malicious activities, researchers at Ben-Gurion University (BGU) of the Negev said in a paper published on July 7.
The researchers observed that drones moved differently depending on the operators location, and that experienced observers can often tell whether the drone pilot is viewing its flight through a screen — in first-person view (FPV) mode — or if they are observing it from the ground. Using a simulated environment, the researchers trained a machine learning model to extract and identify artifacts that leak information about the pilots location.
In the end, the researchers created a dense neural network that could use 120 points from 81 flights to create drone paths to predict from which of three locations a pilot was operating the drone with 73% accuracy, says Eliyahu Mashhadi, lead researcher with BGUs Department of Software and Information Systems Engineering.
Our goal was to make a POC [proof of concept] to see that in the simulator it is indeed possible to deduce the position of the drone operator given a route, or part of the route, that the drone performed, Mashhadi says.
Drones have taken off globally. In the United States, more than 1.5 million unmanned aircraft systems have been registered and more than 170,000 pilots certified as of March 2020,
according to the US Federal Aviation Administration
.
But with their use comes risk. Unmanned aerial vehicles — drones — pose a serious threat to critical and operational infrastructure. In the first quarter of 2020,
more than 370 incidents of drones behaving dangerously
were reported to the Federal Aviation Administration.
Specific incidents highlight that danger. In December 2018, 129 separate sightings of unauthorized drone flights shut down Londons Gatwick Airport, but
no operator was ever found
. In the Middle East and North Africa,
more than 100 drone attacks
have targeted military bases and commercial airports in the past two years. The most damaging attack, however, is arguably the
September 2019 drone strike
on a Saudi Aramco oil processing facility by Iranian-backed Houthi rebels in neighboring Yemen.
While military drones may use different technology, the potential for commercial drones to be used for damaging critical infrastructure poses a threat. In these cases, just as attributing a cyberattack can help punish the attackers, or at least deter future attacks, finding the operator of a drone can help dissuade users from malicious activities.
At present, drone operators are often located using the radio-frequency signals sent from the controller, but sensors generally have to be matched to the various drone technologies in use, according to the researchers. In addition, sensors have to already be on-site and near the operator to be able to locate them.
The academic researcher teams
approach
requires only somewhat accurate location information at a particular sample rate — eight samples per second in the proof-of-concept experiment. Using the path of the drone, the neural network focuses on the speed of the unmanned aircraft systems, the approach the pilot chooses for a flight path, and whether the movement is aggressive or passive.
One flight feature that could help in the future is the drones yaw, the rate of turn around its vertical access, Mashhadi says.
The researchers found that higher sampling rates yielded better predictions. While sampling at a higher rate could have produced better results, the current simulator software did not allow for sampling at a rate higher than eight samples per second.
Maybe in future experiments, we will edit the code — [since] it is open source simulator — so we can record at a higher rate, Mashhadi says. I believe it will improve the results.
While the initial experiment only included three possible locations for the operator, a greater number of locations does not necessarily reduce accuracy, he says.
Since publishing this article, we have done more experiments where there are four options for operator location and two different flight destinations ... and increased our dataset, he says. The results we got were better and we reached 78% accuracy.
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