Just read this article on screen watching, not sure its possible or not, any comments please
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That’s something I don’t believe. I’m more than sceptic about this method.
HDMI signals travel in a shielded cable, but not just on one wire, one signal travels on right 2 wires but inverted on the other. So “radiation” from such a cable is physically questionable, and the whole cable has more data lanes…
Unless someone shows me it’s working, I consider this to be a hoax.
Edit:
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I thought as much, but wanted to question and confirm
I would guess the signal strength is so low that any form of capture if possible wiuld have to be very close proximités and to seperate the band between each one almost imposible.
Its not like bluetooth or wifi where the signal passes unshielded over a distance
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Those are radio waves, so the reception is possible for anyone. By design 
Hence the encryption…
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There’s a brilliant part of Neal Stephenson’s Necronomicon where some hackers in an adjacent hotel room “hack” the EMR from someone’s display from an adjacent room in a hotel… I found it a tad farfetched - but still believable… That book also pre-dated, and kinda predicted crypto-currency…
Must be 5-10 since I read that book - about time for a re-read…
Neal was a “diehard” Linux user - until - Apple released OS X - and switched to Apple… I can understand… it’s UNIX… but never saw the point on x86 (I actually built a couple of Hackintoshes) until Apple switched back to RISC (ARM on Apple Silicon).
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Not read that author will have to look out for him
Well… as always… the truth is in the middle.
Back in the days, with analog VGA it was a pretty common practice.
For HDMI, it’s a bunch more complex and the research referred to, actually did work… but the antenna was actually nearly next to the HDMI-cable (and maybe it even was a badly shielded one).
The power of the research is in the fact that they achieved to sync the signal back into something “kinda reabable”. Under this link, you can actually find a demo video:
But again: the bottom line: you need to be really close (centimeters to maximally a few meters - no walls). As with any academic research, popular media tends to overstate the results.
Here’s the study:
Here’s the code if you want to try it out yourself (requires quite some SDR and crypto knowledge to know what you’re doing):
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I had a browse of the code.
It would take me a long long time to to understand it.
I might be able to run it, but there is not much point.
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Yeah… I guess that’s kind of the definition of academic research.
This is research that isn’t at the very applied level yet.
The good thing is: they released their code under GPLv3.
This means that no money grab can take that code and turn it into a proprietary expensive product.
So… OR it becomes an open source product (which I’m okay with), OR it remains a purely academic POC that doesn’t get integrated into practice (which I’m okay with too) … or (and I’m a bit afraid this is what will happen) … someone will wrap its head around it, implement the same concept in different code and make this proprietary. But then too, it’s a good thing that this code exists in the open. It will allow hardware developers to implement noise or shielding that protects against this attack.
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Doh! Not “necro” but “crypto” : Cryptonomicon :
Alan Turing is a character in it…
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Seen a couple of films based around Bletchley Park and the decrypt of code, interesting subject.
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