Vehicular network security
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United States of America Patent
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Oct 10, 2023
Grant Date -
Jan 7, 2021
app pub date -
Mar 4, 2019
filing date -
Mar 5, 2018
priority date (Note) -
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Abstract
A computer implemented security method operable with a communications network in a vehicle, the network communicatively connecting devices including sensors and actuators in the vehicle such that information provided by sensors and states of actuators are determinable by data communicated via the network, the method including defining a Markov decision process model for the vehicle, the model specifying states of the vehicle and actions constituting transitions between states, wherein a state of the vehicle is indicated by information provided by one or more sensors and a state of one or more actuators, and an action corresponds to a change in the information provided by one or more sensors and/or a change to a state of one or more actuators, each action having associated a probability of occurrence; determining, by accessing data communicated via the network, a current state of the vehicle in the model; accessing data communicated via the network; responsive to the accessed data indicating an action to change the vehicle state to a new state, determining, from the model, a probability of the action; responsive to a determination that the determined probability falls below a predetermined threshold probability, generating an indication that the vehicle state transition is anomalous.
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