NATO's article 5 is summed up as an attack on one being an attack on all. It was only used once, on 9/11, and of course it was civilian infrastructure that was attacked. With Bill C-59, there's going to be a cyber-offensive posture provided to the Department of National Defence and the Canadian Communications Security Establishment. What would be classified as an article 5 in the cyberworld?
On January 30th, 2018. See this statement in context.