I'm not a cyber expert. I've seen enough reports come out, mostly emanating from the United States, that there have been cyber-attacks. Whether they are designed to acquire intelligence—i.e., there are spying missions that have been identified, and the finger has been pointed at the Chinese, who deny it—or whether they are an attempt to imbed some form of undetectable virus such that if some conflict did emerge, it could then be triggered, again, it's beyond me.
The classic example everyone points to, for those who aren't really involved in the cyberworld, like me, is the embedding of the Stuxnet virus in the Iranian centrifuges, which destroyed them. That's sort of the image of what could happen here.