tragically1969
Member
Friends of mine have worked on various defence department projects over the years. One particular one comes to mind where they were required to use transparent conduit with single cable runs and a 1000mm separation between the conduits/cables..... Because inductive coupling is a thing, and apparently a great way to steal information.
Yes, TEMPEST is the name for it, its an interesting read:
https://en.wikipedia.org/wiki/Tempest_(codename)
You can get TEMPEST filters
https://www.mpe.co.uk/category/tempest/
If you decide to go to this length then perhaps these are a good bet too:
https://en.wikipedia.org/wiki/Tin_foil_hat