While different varieties of vehicles may look wildly different, they share many similarities at a digital level. Each protocol, from CAN to MIL-STD-1553 is designed with a variety of tradeoffs and real-world considerations in mind. These considerations create interesting features for cybersecurity professionals to consider. How do these different protocols support the needs of a particular vehicle? Why are these protocols designed in a particular way? In this episode, special guest Matt Rogers discusses what serial data buses are, how the nuances between them affect cyber attackers and defenders, and ways that we can introduce sensible cybersecurity control measures into fleet assets.