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Eavesdropping Vulnerability and Countermeasure in Infrared Communication

Eavesdropping attacks in the cybersecurity world

Eavesdropping Definition

What is eavesdropping?

An eavesdropping attack occurs when a hacker intercepts, deletes, or modifies data that is transmitted between two devices. Eavesdropping, also known as sniffing or snooping, relies on unsecured network communications to access data in transit between devices.

To further explain the definition of "attacked with eavesdropping", it typically occurs when a user connects to a network in which traffic is not secured or encrypted and sends sensitive business data to a colleague. The data is transmitted across an open network or by IR, which gives an attacker the opportunity to exploit a vulnerability and intercept it via various methods. Eavesdropping attacks can often be difficult to spot. Unlike other forms of cyber attacks, the presence of a bug or listening device may not adversely affect the performance of devices and networks.

Securing Against IR Eavesdropping

While the introduction of the IoT (internet of things) has helped the world move forward into a new high-tech era, it’s not without its threats. As devices have become more advanced, new threats emerge – and one of the biggest threats in the office environment is one that many probably don’t even see coming.

We’re talking about electronic eavesdropping, or the practice of intercepting device signals to infiltrate systems and swipe confidential information. Just think of it as a modern-day version of wiretapping, except instead of monitoring phone conversations, people are intercepting IR and RF signals that emanate from the likes of computers, internet routers, smartphones, recorders, and other advanced electronics.

Electronic eavesdropping is a real threat these days – and it could have far-reaching consequences ranging from stolen intellectual property and business secrets to lost trust in the public because of failure to properly safeguard your property.

What is an eavesdropping attack in cybersecurity?

Eavesdropping and cybersecurity are closely intertwined. Eavesdropping attacks in the cybersecurity world are when the perpetrator “listens” to and records data that is transmitted between two devices. In simple terms, the hacker reads messages sent via, for example, an open and unsecured network. This information varies but can be anything from private financial details such as credit card information to other sensitive personal or business information. This knowledge can then be used later for a wide range of purposes, such as demanding a ransom, disrupting operational activity, or selling it to competitors. 

IR (Infrared) eavesdropping

How IR eavesdropping works

IR (Infrared) eavesdropping involves secretly listening to communications or capturing data using infrared light, often with a laser, to exploit vulnerabilities in devices or transmissions. This can include using a laser to detect sound vibrations on a window or capturing data being transmitted wirelessly by devices like smart TVs or other IoT devices that use IR signals for control. Countermeasures include installing specialized IR-blocking window films or other security measures. 

How IR eavesdropping works

  • Laser eavesdropping: A laser beam is directed at a window or other reflective surface in a room. When sound waves inside vibrate the surface, they cause the reflected laser beam to oscillate. A sensor on the receiving end detects these tiny fluctuations and can reconstruct the original sound.
  • Device-based eavesdropping: Infrared signals are used by many consumer electronics like TVs, air conditioners, and smart home devices for communication. An eavesdropper can potentially capture these IR signals to gather information, especially from Internet of Things (IoT) devices. 

Risks and examples

  • Privacy invasion: Sensitive information can be leaked from devices like smart TVs that act as a bridge to other IoT devices, creating a security threat in homes and offices.
  • Data theft: IR eavesdropping can be used to steal information from devices, including data from healthcare gadgets or automatic payment systems.
  • Surveillance: The technique can be used to secretly monitor conversations or activities within a building without the need to physically plant a bug. 

Countermeasures

  • IR-blocking window films: Installing our photonsafe laser protection film on windows will block IR signals from escaping a room, protecting against laser eavesdropping and other IR-based attacks.
  • Physical security: Securing devices and restricting access can prevent the unauthorized use of IR-transmitting devices.
  • Secure communication: Using encrypted communication protocols for devices that transmit data wirelessly can protect against data interception.