This is one of the 2010 releases cameras. It looks like that all 2010 cameras are using a new encryption method for autoboot and firmware files.
Can you please post list of cameras with new encryption method?
If this is true and they changed diskboot and fi2 encryption at the same time and there are no 'transition' camera with only one of them changed - this is really bad news.
It will be almost impossible to get those keys without leaks from service centers.
Even if they changed only encryption key (not method) for diskboot - it will be very hard to bruteforce it (8! of possible values = 40320).
Even not speaking about AES - this is not possible at all