Originally Posted by rollon1980
Good luck with trying to decrypt the messages. The data is definitely backed up in the backup file and then restored onto the receiver when the backup is restored.
I didn't say I was going to spend time on this
, but now I'm tempted. Also after another look at the backup file there is some hint at structure (some patterns repeated multiple times) so maybe it's not really encrypted.
Looking at the network protocol (which is documented) there are GET/PUT commands for:
I tried these on my RX-V675 (which has R.S.C.) and <PEQ><Internal_Data> returns 12224 bytes of data, and <YPAO><Internal_Data> returns 13464 bytes. Again there is some hint at structure, but it's not obvious what is being returned.
There's a good chance part of the internal data is related to the R.S.C. filters, but since the total amount of data is pretty large maybe it includes everything related to YPAO and the PEQ filters so that everything can be saved/restored in one shot to save time (the backup is pretty fast).
But I'm trying not to start looking deeper into this, because I know it will end up taking a lot of time