Drones can steal data from computer LED light! Make me funny?

UAVs have become more and more popular recently because everyone finds it useful. However, there is a problem with drones when they are used: immoral or even illegal.

Drones can be used to steal data, steal it from a computer, and steal light from a PC. The drone with the camera is hovering in the sky, the computer LED flashes, and the data is transmitted to the drone.

Fortunately, stealing data was done in experiments, and researchers at Ben-Gurion University in Israel completed the experiment. To complete the attack and prevent attacks, the researchers designed a solution that uses an "air gap" system to separate sensitive data from potential hackers. However, if an attacker can embed malware into the system, the researchers' methods will fail because the computer's hard drive LEDs may leak data every time they flash.

Mordechai Guri, a researcher at Ben-Gurion University in Israel, said: "If an attacker finds an entry point in the air gap system, the malware can send the data to the attacker. The attacker can control the hard drive. The LED indicator lights up to 6,000 flashes per second. We can transfer data over long distances very quickly."

During the research, the team found that they could transfer data at 4,000 bits per second, and the malware could even make the flicker repeat, ensuring that data was not lost.

Computer LED lights are always flashing and are unlikely to cause suspicion when malware is running. The researchers also found that if the data read each time is less than 4k bytes, the LED flashes for less than 1/5 milliseconds. With the "on-off keying (OOK)" system, flashing sends information to the camera and light sensor. Smartphones can only accept 60 bits of data per second, GoPro cameras can receive 120 bits per second, and the speed is too slow, so the researchers used Siemens photodiode sensors, which can transmit 4000 bits of data per second.

Let the LED light flash quickly, not be noticed by the human eye, and collect data with the light sensor, which the attacker can do. Researchers suggest that if you want to prevent an attacker from invading, it's best to isolate the machine with an air gap system and place it in a safe room away from the window.

We can put a film on the window of the building, which can shield the camera from flashing. There are software on the market that can be connected to the hard disk to create noise. When an attacker steals data through the hard disk LED light, it can interfere.

The easiest and most effective way to stop an attack is to cover the LEDs. If the drone does not see the LED lights, there is no way to steal the data.