not being able to read something which is encrypted is not a driver problem. do u expect the driver to crack the encryption? or guess the key?
nvidia has always been crap like this. Look at amd and intel, they let u write proper drivers (even if its real difficult to do so). No encrypted blobs or voodoo needed.
the nvidia drivers u need to use a card on Linux are unintelligible binary blobs. thats sad as it is. this is worse. they might give some shitty blobs at some point, after they made enough ppl give up on it and switch to give them and their partners their money, souls and firstborn