New TrojPix attack leaks data from air-gapped systems via imperceptible video cable emissions

Researchers at Shandong University have demonstrated a novel method, dubbed TrojPix, to exfiltrate data from air-gapped computers. The technique subtly tweaks on-screen pixels, imperceptible to the human eye, causing the video cable to radiate a faint radio signal that a nearby receiver can decode. While requiring malware on the target machine, TrojPix achieved a peak throughput of 8.1 Mbps and a range of up to 208 meters in tests, significantly faster than many existing air-gap covert channels.