Here's the challenge we're currently facing.
The CSE normally focuses on foreign, not Canadian, sources. In signals intelligence, however, signals have no citizenship. We don't know who's sitting at the keyboard. It may be a Canadian or a non-Canadian.
How can we tell the difference? How can we identify the threat to ensure, on the one hand, that these are indeed foreign signals and, on the other, that we have authority to act, since action has to be taken at some point.