Practical Internet of Things Security - Second Edition

Fault (failure) trees and CPS

A fault tree discussion may seem to be out of place in a section about attacks and countermeasures. The value of attack trees to IoT implementation and deployment organizations should be clear by now. Obviously, the more accurate the attack model, the better the decisions that can be made from it. Attack trees alone are not sufficient, however, to characterize risks to the many new IoT paradigms. In Chapter 1, A Brave New World, we introduced the Cyber-Physical System (CPS), a subset of the IoT. CPSes represent an uncomfortable domain in which both safety and security engineering disciplines must be combined and reconciled to produce engineering solutions that simultaneously mitigate both safety and security ...