The researchers from the University of Rochester have developed an "unjammable" quantum radar that uses the quantum properties of photons. The radar is able to detect any attempts to intercept and modify the radar signal, as this would change the quantum properties of the photons. Mehul Malik tested the concept by bouncing photons off a target and measuring errors in polarization of returned photons. The system imaged the target accurately without interference, but detected attempts to spoof the image, demonstrating the first unjammable quantum radar. However, the researchers note the system could still be vulnerable to more sophisticated jamming techniques.