There were several opportunities this past week that demonstrated unique ICS cyber security issues are still not well-understood. As I flew to Europe for a Smart Grid Cyber Security Conference, my seatmate was a senior executive with a major management consulting firm doing extensive work in the energy industry. He was fully aware of IT security issues. However, when I described the unique issues associated with ICSs and that the Internet was not the primary threat to ICS cyber security, it was new to him.