Assuring Trustworthiness via Structured Assurance Cases
Vehicle to vehicle
communication
Entertainment System
Transmission Control Unit
Telematics
Engine Control Unit
Keyless Entry
Body Controller
Locks, Lights, etc.
HVAC
Antilock Braking and
Steering System
Anti-Theft
TPMS
OBD-II
Figure 5: Multiple Attack Surfaces
In addition to having all these critical
functions dependent on software and
networking, as shown in Figure 6, the
software that drives these abilities needs to
be updated and sustained over the long
term, both to fix flaws and to add
functionality. 9
When we look beyond current vehicle
functions, as shown in Figure 7, we see
connectivity with GPS; connectivity with
other vehicles; connectivity with fuel
management systems; connectivity with the
highway and city infrastructure; and
connectivity with traffic systems. All of these
Figure 6: Exploding Need for Being Updatable and Sustainable
9
Connector Supplier.com, “Automotive Connectivity Evolves to Meet Demands for Speed & Bandwidth,”
http://www.connectorsupplier.com/evolution-automotive-connectivity-autonomous-vehicle-technology-drives-need-speed-
bandwidth/
September 2018
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