| CPC H04L 63/1441 (2013.01) [G06F 21/55 (2013.01)] | 20 Claims |
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1. A control method of controlling a device mounted in a vehicle via a communication network, the control method comprising:
a functional element holding step of holding a plurality of functional elements for executing the control and also backup functional elements that correspond to the plurality of respective functional elements and are capable of executing the same control as the respective functional elements;
an abnormality detecting step of detecting an abnormality caused by a security attack via the communication network;
a processing target identifying step of identifying, as processing targets, a functional element in which the abnormality is detected and a related functional element related to the abnormality among the plurality of functional elements when the abnormality is detected; and
a functional element switching step of switching control functions of the functional elements identified as the processing targets to corresponding respective backup functional elements, wherein
in the processing target identifying step, a functional element that is determined to have an operating status having a similarity to that of the functional element in which the abnormality is detected is extracted as the related functional element based on an operation history of the plurality of functional elements.
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