Hi,
Thank you for posting your query.
Kindly follow the steps provided below to resolve your issue.
The most effective way to protect ECU software from reverse engineering is code encryption. If the communications between MCUs and external memory is encrypted, attackers cannot understand or successfully tamper with code and data without knowing the encryption key. However, encrypted software cannot be directly interpreted by MCUs. On-the-fly decryption enables MCUs to execute its program from the encrypted code.
Go to this link for your reference and other troubleshooting procedures https://www.sciencedirect.com/topics/computer-science/code-encryption
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