> It means that you have no backup. That's actually a feature as it means you have physical access to the device. Obviously you don't want a single card to be

> It means that you have no backup. That's actually a feature as it means you have physical access to the device. Obviously you don't want a single card to be the only key that can access a system, but it's a good technique to authenticate users. Lose the widget and you have to go talk to IT.