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https://arxiv.org/pdf/2407.09717
The paper- Deep-Tempest
https://en.wikipedia.org/wiki/Tempest_(codename) Tempest 2 - Bugaloo
Old tempest used the electronic noise from the CRT itself to decode the signal, this paper is interesting in that it uses the HDMI cable as the transmission source, which is really cool!
I highly recommend the paper, if this threat factors into your activities some thoughts come to mind
- Use a Skif
- Use a shielded HDMI cable and ground the shield
- Use a self contained laptop (and ground it) for your very sensitive data (less cable length, less radio transmission loops)
- Don't display passwords on your screen unless absolutely necessary