You can also search for "side-channel" and "TEMPEST".
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The signals analyzed below are LVDS and VGA, not exactly HDMI, but also an interesting read - because the LVDS signal is used to drive the LCD panel and it's also a major source of leakage.
* Exposing Computer Monitor Side-Channel Vulnerabilities With TempestSDR
* DVI (HDMI) and DisplayPort digital video interfaces in electromagnetic eavesdropping process
https://sci-hub.se/https://doi.org/10.1109/EMCEurope.2019.88...
You can also search for "side-channel" and "TEMPEST".
---
The signals analyzed below are LVDS and VGA, not exactly HDMI, but also an interesting read - because the LVDS signal is used to drive the LCD panel and it's also a major source of leakage.
* Exposing Computer Monitor Side-Channel Vulnerabilities With TempestSDR
https://hackaday.com/2020/07/15/exposing-computer-monitor-si...
The author of the program even wrote a paper on that for a master degree.
https://raw.githubusercontent.com/martinmarinov/TempestSDR/1...