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your HDMI cable can leak what’s on your screen watch the laptop on the left. it reconstructs the video playing on the monitor beside it from radio signals leaking out of the HDMI connection this is TempestSDR. an antenna picks up the leakage, a HackRF radio captures it, and software turns it back into an image researchers took this further with Deep-TEMPEST, using AI to make recovered images and text easier to read. this clip shows the original technique quality depends on shielding, distance and interference. the picture is imperfect, but recognizable content still gets through a wired connection can still leave a wireless trace