Anyway, the point is that we've seen some examples of it. I'm no expert in this field, but I don't think one needs to be to understand the threat to our energy grid systems, our defence systems, out intelligence systems—all the things we need to have working.
This leads me to one side question: does DND have a separate, secure, stand-alone system? If we were under a cyber-attack and everything else went down, do they have a stand-alone system, or are they part of a network-wide threat?