AM2431: secure storage

Corey Olson

Part Number: AM2431

In the datasheet, it says that the AM243 has "Secure storage support". Where can I find details on what's available? I can't seem to find that in the datasheet nor the TRM.

over 2 years ago

0 Aakash Kedia over 2 years ago

TI__Mastermind 26145 points

Hi Corey Olson,

Flash Subsystem or FSS supports OTFEA i.e. On-the-fly Encryption and Authentication.

Hope it helps.

Best Regards,
Aakash

0 Corey Olson over 2 years ago

Prodigy 65 points

I was hoping that there would be some sort of secure internal storage. Are you saying that this is a way to encrypt and authenticate external storage?

+1 Aakash Kedia over 2 years ago in reply to Corey Olson

TI__Mastermind 26145 points

Hi Corey Olson,

Corey Olson said:
secure internal storage

Well there is eFuses available in Secure Region called GP_OTP for general purpose use. But the size is very limited i.e. 384 bits.

Corey Olson said:
encrypt and authenticate external storage

Yes, the data will always be available in external storage in encrypted format. The encryption can be done via Hardware Accelerators, the flashing has to be done via OSPI controller. But the mem-map reads will be decrypted via OTFE/OTFA i.e. Over the Fly Encryption/Authentication.

Hope it helps,

Best Regards,
Aakash

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AM2431: secure storage