Well, I know that it can be difficult, not programming it but maybe in a multiplayer version it can generate some troubles. What if you can craft a Password Panel and connect it to chests and doors? I would love something like this. It's a litte suggestion, I know. I guess that someone with a good system makes it. Sorry for my bad English, I know it's far from perfect haha.
Yeah that would be very helpful and that would make it so they could do multiplayer easier because then people would not have to worry about other players randomly dropping in and stealing stuff if they make the whole connected so people could have some sort of drop in and out play.
Ships themselves should be passworded (random people not just beaming in without authorization). +1 on the idea
Or make the eye/fingerprint scanners actually scan to see if it's the right player. That way you don't have to worry about forgetting your password.