United States Department of Transportation
i
Vehicle trust management for connected vehicles : final research report.
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2016-01-01
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[PDF-1.71 MB]
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Edition:Final research report
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Abstract:The goal of this project is to research a wide range of transportation-related issues
including: improving health and safety for all users of the transportation system, including
bicycles, pedestrians and transit modes; reducing carbon emissions and other
environmental impacts of transportation through a transition to zero-emission vehicles and
fuels; and evaluating how increasingly autonomous vehicles affect driver behavior, safety
and performance.
Consider a scenario where a vehicle on a highway broadcasts a message with an incident
report (e.g., accident, traffic congestion, broken bridge) to the vehicles immediately behind
it using the underlying V2V network. Each receiving vehicle forwards the message further
downstream. Additionally, if a forwarding vehicle (that is, the user driving it) believes the
message itself, it will endorse the message by signing it. A vehicle originating an incident
report will always endorse it. Consequently, a vehicle receiving a V2V incident report will
have at least one endorsement associated with it. Upon receiving an incident report, a
vehicle needs to make a decision on whether it trusts the report based on all the vehicles
that have endorsed the report. This decision is taken based on: (1) a trust triple computed
for each of the endorsers, and (2) combining the individual endorser trust triples to produce
an aggregate trust score for the message.
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