The world has come a long way in the last twenty years. For the second half of the 20th century, the biggest fear was nuclear war. Today that's still a concern, but for most governments, a bigger worry is in cyberspace.
We've already seen the beginnings of what a cyberwar could look like with nations trading viruses that sabotage equipment. The U.S. and Israel allegedly attacked Iran's nuclear program with Stuxnet.
Then Iran turned around and used parts of Stuxnet to attack Saudia Arabia's oil production systems. China, Iran and Russia have been poking around in U.S. government and company systems, and the NSA regularly tampers with Internet equipment so it can return the favor.
However, that's just the beginning. Speaking to Forbes, Ray Boisvert a former director in the Canadian Security Intelligence Service, highlighted four big threats that cyberwarefare will bring.