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hello Karl, replies in the clear below, as usual :)
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On Wednesday, May 5, 2021 11:14 AM, Karl <gmkarl@gmail.com> wrote:
>
> I have some books digitally archived, but with a focus on shielding
> rather than covert communications...
this is EMSEC (emissions security)
you can play with it youself, speaking of SDR :P
https://github.com/martinmarinov/TempestSDR
Your challenge is to understand things well enough to do this with an rtl-sdr, which is quite possible given a screen refreshes so many times per second.
If you can do that, you can make a commonplace device that reveals the displays of surrounding other devices. This will get people actually acting on this severe issue, rather than pretending it is safer to hide it.
Try to sniff something else too, so people don't think that encrypting and shielding their display signals resolves the situation. We need shielded spaces to do secure work in, or we do not have a democracy, in this digital age.
Woah either I've never visited that article before or it's been improved a lot in the past few years!
enjoy!
best regards,
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