Presumably if you plug a keyboard or mouse in and it starts reading &#x2F;secret, somebody will notice and generally you can deny the device the ability to do that technical means.  I&#x27;ll be honest, I&#x27;m not sure how open these things are at the moment, but I imagine if a device registers as a mouse, it should have limited functionality.<p>That said, your point is largely on the money that, were&#x27;re taking great faith that your computing device is secure.  But at the same time, I&#x27;d put more stock into a device that handles my super secret key and attempts to make reading it and tampering impossible &#x2F; unfeasible from the devices I plug it into.<p>Thusly, it&#x27;s perfectly resonable to care more about your yubikey than your mouse, from a security perspective.