Hackers can wirelessly watch your screen via HDMI radiation

Researchers from the University of the Republic in Montevideo, Uruguay, have developed a technique that allows hackers to wirelessly intercept and interpret video signals from HDMI cables using electromagnetic radiation. This method, referred to as "Deep-TEMPEST," combines wireless electromagnetic monitoring with AI algorithms to read text displayed on a victim's screen. The researchers found that even though HDMI is a wired standard typically encrypted with HDCP, enough electromagnetic radiation is emitted to be detected without direct access to the cable.

The AI model can process these electromagnetic fluctuations and, when paired with text recognition software, can achieve up to 70 percent accuracy in interpreting the data. This represents a significant improvement over previous methods, making it feasible for attackers to capture sensitive information, such as passwords, from a distance, potentially even from outside a building under optimal conditions.

While the concept of intercepting electromagnetic signals for surveillance is not new, the application of AI in this context raises serious security concerns. The researchers suggest that this technique is already being utilized by state-level spies and industrial espionage agents. Although the complexity of the method may limit its use to high-stakes targets, organizations with sensitive data, particularly government agencies and large companies, should consider implementing electromagnetic shielding measures to protect against such vulnerabilities.