Reply to post: The removal does trigger the command

Rowhammer rides again as FPGA attack, RSA again reportedly up for sale, anti-theft kit to nuke laptops, etc

Richard 12 Silver badge
Facepalm

The removal does trigger the command

The "breakaway" part is a USB cable. The actual USB device is at the other end, right by your belt etc.

The point is that USB sockets are sometimes a bit stiff and USB sticks fragile, so you want to make certain that your security key is definitely going to disconnect and trigger the udev rules.

Otherwise the guts of the $5 USB stick might just stay in the socket while the chain and case dangles from your belt, until the miscreant finds their rubber ducky.

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