To enhance the convenience and efficiency of automotive software upgrades, a method utilizing Over-the-Air (OTA) technology is proposed. In this approach, the Bootloader system establishes a wireless connection to Alibaba Cloud, transmitting firmware packages earmarked for upgrade to the cloud. The cloud then facilitates the download to the gateway board, which, through its Lora module, transmits the firmware to multiple sub-devices, enabling a bulk remote upgrade process. Taking the BCM automotive controller core board as an example, the relay transmission feature of Lora is utilized to extend the transmission range, while the built-in AES encryption algorithm ensures the security of the transmitted firmware packages. Experimental results demonstrate that this remote data update technology significantly accelerates the rate of automotive software updates, reducing the workload and staff requirements in the process. Moreover, this remote data update technology is equally applicable to address status detection issues in body control modules.
Analyze the encryption and decryption principle of KeeLoq and the shortcomings in security, propose an improvement scheme for KeeLoq algorithm to further improve its security; and conduct experimental verification by a BCM controller of a car, the experimental method is to combine the 027 service in the UDS protocol in KeeLoq algorithm to generate key authentication between the key side and the car side, the protocol generated temporary The key is passed with the factory key and serial number to derive a new password, and finally the key generation algorithm and the communication parties obtain the improved KeeLoq key in the learning process. The performance comparison with the original KeeLoq and triple KeeLoq algorithms concludes that while improving the security of the original algorithm, it reduces the complexity of the algorithm and increases the computation rate compared to triple KeeLoq. It is more suitable for PEPS system.
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