Cyber experts, in the light of the Optus hack are sounding the alarm bells about how easy hacking is in Australia. Yes, but there are cyber-security issues going far beyond what we recently saw, and relate to national security. Thus, how secure is the grid from cyber-attack from people who really know how to do it, such as the Russians and communist china? What about EMP attacks? There is an American literature on this, much produced by the late Dr Peter Pry, but one can search in vain on the internet for ages and find nothing for Australia, indicating that the problem has not even been addressed. EMP and grid-directed cyber-attacks will be the first things done in world War III, which is coming up soon. The chaos will be predictably immense.