I'm afraid all the files on the sd card are encrypted with a key...save files we can handle...
Me too, it's really interesting. Why are the save files on the EEPROM not decrypted with a key too?
I wanted to help a bit finding hashes in savegames (and what they actually hash) so I have written a hashscanner, a tiny program which searches md5 and sha-256 hashes
of blocks (with any size) adn the file. I can say: There's no block which has a 0x12 size (or less) which is hashed with md5 or sha256 in savegames.
Maybe my tool can find the blocks which are hashed after the DIFI,IVFC, DPFS blocks.