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AM623: How do linux/u-boot get e-Fuse key to verify OTA data

Part Number: AM623

Dear TI expert,

We are planning to perform an OTA "Delta update" on our AM623 HS-SE device, and we would like to confirm the feasibility of our proposed flow:
1.Encrypt the OTA data
2.Sign the OTA data with x509
3.Download the OTA data to the device
4.In the device, retrieve the e-Fuse key to verify the signature and decryption.

Regarding step 4, we are unsure if the device can retrieve the e-Fuse key for the purpose of signature verification and decryption. Can you provide some guidance on this matter?

Best regards,
Andy