MQTree: Secure OTA Protocol Using MQTT and MerkleTree

. 2024 Feb 23;24(5):1447. doi: 10.3390/s24051447

Algorithm 3 Firmware update algorithm

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procedure UpdateFirmwareInMCU(firmware)
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if not IsVehicleParked() then
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return “Vehicle is not in a parked state.”
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end if
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$u s e r C o n f i r m a t i o n$ ← GetUserConfirmationForUpdate()
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if not userConfirmation then
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return “User has cancelled the firmware update.”
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end if
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$s e c u r e C o n n e c t i o n$ ← VerifyInternalNetworkConnectionWithECU()
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if not secureConnection then
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return “Failed to establish a secure network connection with the internal ECU.”
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end if
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UploadToFirmware(MCU, firmware)
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VerifyUpdateSuccess()
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PerformPostProcessing()
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end procedure