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Re:Academics steal data from air-gapped systems using PC fan... by lostlogin on Saturday April 18, 2020 @05:47PM (#22911380)
> DiskFiltration - use controlled read/write HDD operations to steal data via sound waves

There is almost nothing I miss about spinning disks, but having an audible indication that something was going wrong was helpful. I refer to inappropriate disk usage (too little or too much) rather than the noises that preceded a disk death.

Re:Academics steal data from air-gapped systems using PC fan... by crote on Saturday April 18, 2020 @07:25PM (#22911998)
It also works the other way around: sound will make harddrives malfunction.

This means that one could theoretically use a harddrive as a microphone!

See https://www.youtube.com/watch?v=tDacjrSCeq4 for a demo, yelling at harddrives increases their latency.

Re:Academics steal data from air-gapped systems using PC fan... by ciabattabread on Saturday April 18, 2020 @09:47PM (#22912783)
For a brief second I thought your link was the Radiohead cover that used old computer equipment, including hard drives as speakers. Here’s that link: https://youtu.be/pmfHHLfbjNQ
Re:Academics steal data from air-gapped systems using PC fan... by ShamelessC on Saturday April 18, 2020 @10:34PM (#22912997)
Thanks for sharing that! I had forgotten that Radiohead help a competition to remix Nude. Interesting tidbit from the YouTube summary:

Radiohead held an online contest to remix "Nude" from their album - "In Rainbows" This was quite a difficult task for everybody that entered, as Nude is in 6/8 timing, and 63bpm. Most music that's played in clubs is around 120bpm and usually 4/4 timing...

...I decided to take the piss a bit, as the contest seemed to be in that spirit. Based on the lyric (and alternate title) "Big Ideas: Don't get any" I grouped together a collection of old redundant hardware, and placed them in a situation where they're trying their best to do something that they're not exactly designed to do, and not quite getting there. It doesn't sound great, as it's not supposed to.

I personally disagree and think it sounds awesome but I get what he means.

Re:Academics steal data from air-gapped systems using PC fan... by function_seven on Saturday April 18, 2020 @07:06PM (#22911858)
You know how some electric cars create fake engine noise at low speeds to avoid sneaking up on pedestrians?

I wish that was an option with SSDs. A little speaker included with the package that I could toggle on. All it does it make fake HDD sounds. Bonus if those sounds match the underlying logical distance and “shape” of the read/write activity.

Re:Academics steal data from air-gapped systems using PC fan... by detaro on Saturday April 18, 2020 @07:07PM (#22911869)
I wonder if one could make something driven purely by the diskactivity LED that's mildly convincing
Re:Academics steal data from air-gapped systems using PC fan... by _Nat_ on Sunday April 19, 2020 @04:03AM (#22914321)
Seems like a quirky-fun sorta project!

If you've got an SSD connected by a power cord, presumably you could insert an electric-current-meter to see how much power it's drawing, then hook up a speaker to make corresponding sounds.

Maybe also put a temperature probe inside of the SSD's box (perhaps directly on a controller-IC?), then another probe just outside of the SSD's box (or inside of it, but away from the controller-IC?), then use that temperature difference too?

A software solution would probably be easier, but then you'd have to trust the system to give correct information, which I guess would defeat the point.

Someone who'd really want to go at this might make their own controller to place between the motherboard and SSD. But unless it's passive/transparent, allowing the normal SSD driver to be used, that'd seem to require writing a driver for the controller too.

Re:Academics steal data from air-gapped systems using PC fan... by johnchristopher on Sunday April 19, 2020 @04:15AM (#22914362)
Re:Academics steal data from air-gapped systems using PC fan... by thelittleone on Saturday April 18, 2020 @09:29PM (#22912697)
Could be a fun little utility that produces magnetic HDD sounds when doing SSD IO.
Re:Academics steal data from air-gapped systems using PC fan... by amiga-workbench on Sunday April 19, 2020 @02:57AM (#22914107)
I've slowly been moving all my classic machines over to solid state storage and the lack of sound does take something away.

I wonder if you could design something to sit inline on an IDE connection and emulate hard disk sounds in relation to read/write workloads...

Re:Academics steal data from air-gapped systems using PC fan... by bonestamp2 on Sunday April 19, 2020 @03:02AM (#22914120)
Or maybe some software that can watch for unusual behavior and throw up an alert.