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Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

arxiv.org

21–30 of 32 posts

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#21

Two meters seems like a pretty short distance to bypass an airgap. At that point, in the kind of situation where someone is actively trying to exfiltrate data, couldn't they point their phone camera at a screen? Like, maybe there are scenarios where the exit device is compromised without the wearer knowing, or the spy wants to remain discrete, but they seem a bit niche.

"Attacks only get better." It's 2m... now.

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#23
post #8

My uncle described the air gapped facility he worked in… when they said no EM out, they meant nothing in or out except humans and filtered air. It was behind dual interlocking nuclear blast doors and concrete. Even the water was sourced and recycled on site to prevent documents or capsules exfiltration via the sewer.

What facility was that?

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#24
post #3

For those unindoctrinated with the underlying phenomenon being exploited, this demo[1] was shared almost a decade ago. Also, undiscussed mitigation techniques[2] relevant to this general class of nuisance that circuit designers may find of value. [1] https://news.ycombinator.com/item?id=8862689 [2] https://news.ycombinator.com/item?id=41505772

I wonder if the neurons in my eyes are also making tiny sounds when viewing the pattern. :)

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#25
post #20
post #17

Earlier quoted context omitted.

if he sometimes got searched when he went into work then he was probably permitted to bring things in such as lunch

Actually, it's probably the opposite. The searches are more than likely to make sure you're not bringing anything in that could exfiltrate data like a camera, usb drive, or even pen and paper. I work in a similar, secure environment. We are not allowed to bring any items in other than our persons, smart card that we scan on enter/exit, and the clothes on our back. We have to leave the facility to use the bathroom, ea…

The typical SCIF is configured with the break room, bathrooms and maybe lockers outside of the secure perimeter, the "regular" office space. Along with a wall mounted shelf area for people to put their wallets and phones.

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#26
post #8

My uncle described the air gapped facility he worked in… when they said no EM out, they meant nothing in or out except humans and filtered air. It was behind dual interlocking nuclear blast doors and concrete. Even the water was sourced and recycled on site to prevent documents or capsules exfiltration via the sewer.

All sorts of practical questions. Can you bring in a lunch (is that a Coke bottle or a secret camera?)? Are there trash bins? If there is water, does that mean there are bathrooms (who does the restocking?)? Is there coffee?! Who/how do you get data into the network? Who/how do you get data out of the network? Can you bring in printed reference materials from a slightly less secure facility? Bottom line: probably a h…

Depends on the site.

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#27
post #8

My uncle described the air gapped facility he worked in… when they said no EM out, they meant nothing in or out except humans and filtered air. It was behind dual interlocking nuclear blast doors and concrete. Even the water was sourced and recycled on site to prevent documents or capsules exfiltration via the sewer.

All sorts of practical questions. Can you bring in a lunch (is that a Coke bottle or a secret camera?)? Are there trash bins? If there is water, does that mean there are bathrooms (who does the restocking?)? Is there coffee?! Who/how do you get data into the network? Who/how do you get data out of the network? Can you bring in printed reference materials from a slightly less secure facility? Bottom line: probably a h…

I guess it would be just like in nuclear power stations. You can't bring food in, not even toilets are inside the big "sphere".

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#28

This author appears to be quite focused on side channel attacks against various computer components. It appears nearly all of his 32 publications are regarding side channel attacks. https://arxiv.org/search/cs?searchtype=author&query=Guri,+M

I mean, that's how academia works. You find your niche and then publish a bunch of articles around it. Much harder to publish on a bunch of unrelated topics.

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#29
post #8

My uncle described the air gapped facility he worked in… when they said no EM out, they meant nothing in or out except humans and filtered air. It was behind dual interlocking nuclear blast doors and concrete. Even the water was sourced and recycled on site to prevent documents or capsules exfiltration via the sewer.

All sorts of practical questions. Can you bring in a lunch (is that a Coke bottle or a secret camera?)? Are there trash bins? If there is water, does that mean there are bathrooms (who does the restocking?)? Is there coffee?! Who/how do you get data into the network? Who/how do you get data out of the network? Can you bring in printed reference materials from a slightly less secure facility? Bottom line: probably a h…

It is a huge PITA. I recently quit a job where I helped out with a PKI environment that was air-gapped.

We employed a lot of improvised quality of life solutions that management doesn't want to know about.

Re: Pixhell Attack: Leaking Info from Air-Gap Computers via 'Singing Pixels'

#30
post #20
post #17

Earlier quoted context omitted.

if he sometimes got searched when he went into work then he was probably permitted to bring things in such as lunch

Actually, it's probably the opposite. The searches are more than likely to make sure you're not bringing anything in that could exfiltrate data like a camera, usb drive, or even pen and paper. I work in a similar, secure environment. We are not allowed to bring any items in other than our persons, smart card that we scan on enter/exit, and the clothes on our back. We have to leave the facility to use the bathroom, ea…

i see, thanks!
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