What, exactly, is “National Cyber Security”? &nbsp;The  rise of cyberspace as a field of human endeavour is probably nothing  less than one of the most significant developments in world history.  Cyberspace already directly impacts every facet of human existence  including economic, social, cultural and political developments, and the  rate of change is not likely to stop anytime soon. However, the  socio-political answers to the questions posed by the rise of cyberspace  often significantly lag behind the rate of technological change. One of  the fields most challenged by this development is that of “national  security”. This book provides detailed background information and in-depth  theoretical frameworks to help the reader understand the various facets  of National Cyber Security, according to different levels of public  policy formulation.The four levels of government - political, strategic, operational  and tactical/technical - each have their own perspectives on National  Cyber Security, and each is addressed in individual sections within the  Manual. Additionally, the Manual gives examples of relevant institutions  in National Cyber Security, from top-level policy coordination bodies  down to cyber crisis management structures and similar institutions