A substantial amount of academic wrangling has evolved competing definitions for the concepts of threats, vulnerability, and risks. In the interest of keeping this volume practical and usable, we first revisit in this section what the information assurance industry has termed the five pillars of information assurance. These pillars, or domains, of information assurance represent the highest-level categories of assurance in an information system. Next, we will introduce two additional pillars that are critically important in cyber-physical systems. Once introduced, we then explore IoT threats, vulnerabilities, and risks.
Primer on threats, vulnerability, and risks
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