Michelle Price, Department of Prime Minister & Cabinet (currently at the ANU National Security College) is speaking on "Cyber security in relation to Australia’s energy security". This is part of an Energy Security Forum.
Dr. Price suggested talking about "critical services", rather than critical infrastructure. This is to focus on what people need, rather than poles and wires. For the first week of a disaster she suggested the Internet and electricity are all that are needed. I found this surprising, as I had assumed the HF radio systems Australian governments maintain would be sufficient for essential services. In 2015 the Australian Defence Force tested transmitting digital video via an Internet Protocol (IP) data link over Wideband High Frequency (WBHF) radio between Canberra, Townsville, Wagga, and an
aircraft on the ground in South Australia.