"Why BusKill?
BusKill is a Dead Man Switch triggered when a magnetic breakaway is tripped, severing a USB connection. "
Has articles about qubes as well:
Sound an interesting project.
@maltfield nice stuff 
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Hey @TNT_BOM_BOM, thanks 
Here’s the explainer video, which I think unpacks the idea of the cable better than words can convey
We’re just finishing the first production run thanks to a successful crowdfunding campaign on crowdsupply, and the cables should be shipping to backers in the next 1-2 months.
Of course, you can also make your own cable (it’s all open-source)
Right now the cross-platform GUI app just locks your screen, but on Linux you can make it shutdown or self-destruct (wipe your LUKS header) in just a few seconds (see the guides linked-to above). It takes 5.2 seconds from cable-separation to shutdown in Ubuntu
Let me know if you have any questions about BusKill
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RAM wipe on shutdown to defeat a cold boot attack seems to be a related feature.
Does BusKill already implement RAM wipe on shutdown? Does the dracut module cold-boot-attack-defense (by security-misc) seem interesting / sanely implemented to you?
Related:
Is RAM Wipe possible inside Whonix? Cold Boot Attack Defense
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I guess that is:
Will be posting there.
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I will be interpreting this forum post as a development todo ticket to implement a:
- panic shutdown script
- panic button
- panic shutdown start menu entry
- panic shutdown on user action such as removal of some USB device (similar to BusKill) / USB kill cord