This unique compendium is based on the author's teaching and research experiences. It covers the fundamental principles in cybersecurity and helps readers understand how various attacks work, what their fundamental causes are, how to defend against them, and how various defense mechanism's function.For each security principle, the book uses a series of hands-on activities to help explain the principle. Readers can 'touch', play with, and experiment with the principle, instead of just reading about it.This useful reference text benefits professionals, academics, researchers, graduate and undergraduate students in digital security.