Hackers can see computer screens through HDMI radiation

AThe threat of cyber security is increasingly diverse and sophisticated. One of the newest techniques found is the ability of hackers to see your computer screen wirelessly via HDMI radiation. This technique combines wireless EM monitoring and AI algorithms to “read” the text on the victim’s screen via HDMI radiation, and this technique seems to have been used in the field.

What is HDMI radiation?

HDMI or High-Definition Multimedia Interface is a standard cable for transmitting digital video and audio. Although it is usually considered safe and protected by digital encryption, it turns out that HDMI cables emit electromagnetic radiation that hackers can use to steal information.

latest techniques in monitoring em

A team of researchers from Uruguay found that electromagnetic radiation emitted by HDMI cable can be interpreted by processing it using AI. Three scientists from the University of the Republic in Montevideo published their findings on the ARXIV Cornell service, which was later reported by Techspot.

How does it work?

Researchers successfully trained the AI model to interpret small fluctuations in the electromagnetic energy of wired HDMI signals. Although HDMI is a wired standard and is usually digitally encrypted, there are quite a number of electromagnetic signals coming out of this cable to be detected without direct access.

1. Detection and Decoding: decoding the signal is a different challenge. However, researchers found that by using AI models combined with text recognition software, they could “read” wireless EM radiation with an accuracy of up to 70%.
2. Effectiveness: Although this is still far from conventional records, the accuracy of 70% is an increase of 60% from the previous method. This is more than enough to steal passwords and other sensitive information.
3. Reach: This technique allows monitoring wirelessly without physical access to the target computer, even from outside the building in ideal conditions.

named Tempest during World War II

Utilizing wireless electromagnetic signals for surveillance is not a new idea. This vulnerability is known as Tempest (Transient Electromagnetic Pulse Emanation Standard), with roots originating from espionage since World War II. However, with digital transmissions that have at least an encryption level through HDCP systems, HDMI cables are considered less vulnerable. The attack method assisted by this AI algorithm, called “Deep-Tempest,” opens up a very disturbing possibility.

What is Tempest?

Tempest is a safety standard designed to prevent tapping of information through electromagnetic radiation from electronic devices. However, the “Deep-Tempest” method shows that even encrypted signals can be exploited.

Impact and preventive measures

The researchers claim that these systems or identical functional alternatives are already used by country-level spies and industrial espionage agents. This technique is very sophisticated and requires closeness to the target system, so it is less likely to have an impact on ordinary users. However, government agencies or large companies with sensitive data must be careful and may need to consider EM protective measures—and this is especially important for employees who work from home.

Preventive measures

1. EM protector: Using electromagnetic shields on electronic devices and cables can reduce the risk of tapping. Many of the literatures refer to the basic material that has the potential to be an electromagnetic wave absorber as a ferrite-based magnetic material, namely: barium hexaferite and strontium hexaferite.
2. safe location: Keep electronic devices in safe locations and away from potential physical threats.
3. Improved network security: Using a strong network security system to prevent unauthorized access.
4. awareness and training: Raising awareness and training for employees regarding the latest cyber security threats.

Conclusion

The ability of hackers to monitor your screen wirelessly through HDMI radiation is a real threat in today’s cyber world. By understanding how this technique works and taking appropriate preventive measures, we can protect sensitive data and information from these threats.

FAQs related to hackers can see computer screens

1. What is HDMI radiation?

HDMI radiation is an electromagnetic signal emitted by an HDMI cable when transmitting digital video and audio.

2. How can hackers take advantage of HDMI radiation?

Hackers can use wireless EM monitoring techniques and AI algorithms to interpret fluctuations in electromagnetic energy from HDMI signals and read information on the victim’s screen.

3. What is Tempest?

Tempest is a safety standard designed to prevent tapping of information through electromagnetic radiation from electronic devices.

4. What are the preventive measures against this attack?

Using electromagnetic shields, keeping devices in safe locations, improving network security, and providing training and awareness to employees are some of the preventive measures that can be taken.

5. Does this attack have an impact on regular users?

These attacks are more likely to target government agencies or large companies with sensitive data, but it is still important for all users to take appropriate security measures.