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SK-AM62: I want to ask whether the encryption method of the new version and the old version have changed?

Part Number: SK-AM62

Tool/software:

Hello, my device is of HSSE type. R5 was previously developed under version mcu_plus_sdk_am62x_08_06_00_18. The compiled firmware will finally be signed by the appimage_x509_cert_gen.py script and then combined with custMpk_am62x.pem generated by our company, which can successfully run on HSSE devices before.
Now, I want to move the project to mcu_plus_sdk_am62x_10_00_00_14. Unfortunately, R5 failed to load the signed firmware even though I had replaced the custMpk_am62x.pem file in the files directory with our company's custMpk_am62x.pem file.
I want to ask whether the encryption method of the new version and the old version have changed?