I am sure it could be done but I'm not convinced it would be worthwhile. While everything in RAM would be encrypted, that data would need to have been decrypted for the CPU to make it usable. Anything running within the system could therefore deliver you unencrypted data.The idea is to have a board with a light system that can encrypt all the data and no other way for the data to be decrypted without the AES key that it's given to the AES ASIC on the first start-up, protected with a password to set the key.
Also if I download from the system the data will be encrypted so we need to decrypt the data.
What are you hoping to achieve or prevent by having this ?
I have created microcontroller systems where the data in external EPROM and RAM was 'encrypted' simply through swapping address and data bus lines. Take the EPROM or RAM contents ( if one could ) and it would not reveal raw data without untangling that, but as far as the micro was concerned it was all entirely unencrypted and as it should be. It was easy to dump the unencrypted raw data from within the micro.
Statistics: Posted by hippy — Fri Jul 26, 2024 10:36 am