I didn't use to worry particularly about the cyber threat from al-Qaeda's affiliates or from rogue nations such as North Korea. But over the last few years a very important development has occurred in the cyber realm, and that is the growth in black market sales of zero day exploits and other kinds of cyber-weapons that enable potential adversaries who never would have had the resources on their own to develop sophisticated cyber-weapons to buy them, no questions asked.
The proliferation of sophisticated cyber-weapons is a challenge and an opportunity again for U.S.-Canadian collaboration: what to do about this arms race, essentially, in cyber-weapons; whether there are opportunities through the Wassenaar Arrangement or other international cooperative arrangements that might begin to clamp down, knowing that doing so will be very difficult.