This book provides a scientific modeling approach for conducting metrics-based quantitative risk assessments of cybersecurity threats. The author builds from a common understanding based on previous class-tested works to introduce the reader to the current and newly innovative approaches to address the maliciously-by-human-created (rather than by-chance-occurring) threat, and related cost-effective management to mitigate such risk. The enriched Java applets provided by the author at the book's specifically preserved website will enable the reader to utilize the course related problems....