Hacking is not something they could prevent, even if they develop something further and bigger, then they would find another more developed way to hack. The only thing that could stop people would be offline, cold storage ways, why do you think that no nation has ever hacked into another nations nukes and blew it up? Because its mainly manual, sure there are some coding and electronics involved, but you can't activate and blow it up without manual input as well. We should try to slow this down of course, but UN will not be able to stop it all together, that's just not possible, it will happen, maybe a bit less now but still going to happen.