When contending with the complicated and interconnected devices of the Industrial Internet of Things (IIoT), the question of trustworthiness is often introduced. How do we make certain that the systems as designed are worthy of trust? Questions like this are intuitive and necessary, of course. However, they often lack the rigorous framework needed for a robust implementation in system design. “Trust” is a word that we may all think we understand, but when applying it to a network connected device in a crucial automotive subsystem, the word’s precise formulation becomes paramount.