@silverwizard @mwl well yes there are keys but they never leave the device, and they are supposed to be inaccessible even when you have access the physical key (there was a vulnerability discovered in older yubikeys that made them copiable recently, but if someone has access to the usb key physically they could just steal it at this point as with any "something you own")

But sure, there are keys in it. But following this logic everything in our universe is information so everything you own could technically be copied, but that's not a good way to think about it is it