Analysis of Leaked Electromagnetic waves in Multi-Video Systems with Common Clock and Vertical Synchronization

The rapid evolution of the digital landscape through advancements in electronic devices, wireless communication, and electromagnetic wave technologies has brought both convenience and new security concerns. One such security challenge is TEMPEST (Transient Electromagnetic Pulse Emanation Standard), which exploits electromagnetic waves for potential information leakage. This paper focuses on analyzing and restoring leaked electromagnetic waves, particularly in the context of video systems operating under identical clock frequencies—a scenario not adequately addressed by previous researches. The main content involves presenting and experimentally verifying a method for identifying leaked electromagnetic waves from systems with identical clock frequencies by analyzing electromagnetic characteristics related to frequency and phase.