This work develops perspectives and approaches to crucial cyber-security issues that are non-political, non-partisan, and non-governmental. It informs readers through high-level summaries and the presentation of a consistent approach to several cyber-risk related domains, both from a civilian and a military perspective. It explains fundamental principles in an interdisciplinary manner, thus shedding light on the societal, economic, political, military, and technical issues related to the use and misuse of information and communication technologies.