Patent
Update management method, update management system, and non-transitory recording medium
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TLDR
In this article, the authors propose an update management method that causes an external tool, capable of transmitting an update message to update data within electronic control units (ECUs) making up an onboard network, to update shared keys and the like within the ECUs, while reducing the risk of all ECUs being unauthorizedly rewritten in case where secret information given to the external tool is leaked.Abstract:
An update management method causes an external tool, capable of transmitting an update message to update data such as shared keys within electronic control units (ECUs) making up an onboard network, to update shared keys and the like within the ECUs, while reducing the risk of all ECUs being unauthorizedly rewritten in a case where secret information given to the external tool is leaked. The update management method receives and verifies update authority information indicating authority of the external tool. In a case that an update message instructing updating of shared keys or the like of one or multiple ECUs has been transmitted from the external tool, if the verification is successful and the update authority information indicates that the transmission of the update message is within the range of authority of the external tool, the update is executed at the ECU, and otherwise, update at the ECU is inhibited.read more
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References
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Patent
Over-the-air vehicle systems updating and associate security protocols
TL;DR: In this paper, a method of updating a vehicle ECU includes establishing communication between a data communications module of a vehicle and an update server via a cellular network, validating the vehicle using a key exchange protocol between the data communication module and the update server; and sending update information from the updating server to the data communications modules of the vehicle via the cellular network.
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