The current system I am working on, using the i.mx RT 1020 chip, should ideally run the application code from the external SDRAM. I've already set up an example bootloader that simply copies the application program image from Flash to the SDRAM and runs it, however now I'm thinking how to secure the data that's stored there during run-time.
I understand that the FlexSPINOR Flash interface comes "equipped" with the Bus encryption engine that enables seamlessly encrypted Flash data, however what is the equivalent system for external volatile storage? I've been investigating the "i.MX RT1020 Processor Reference Manual" for a while now, but haven't been able to reach a conclusion.
Thanks in advance!