Star Wars is arguably the biggest franchise Disney has purchased, with the entirety of Marvel Comics being a close second. This ended up being a worthwhile buy for the company, as the most recent Star Wars films like The Force Awakens and The Last Jedi have made Disney a ton of money. With all this in mind, it's easy to see why the higher-ups would be paranoid about any potential leaks, although the measures they have taken might be a bit extreme.
Rian Johnson, the director of The Last Jedi, spoke to Wall Street Journal and detailed how the House of Mouse made sure nothing he wrote would get out. Johnson revealed that he wrote the script of The Last Jedi in an air-gapped MacBook Air that was never connected to the Internet. The director also revealed that he had to keep it in a safe at Pinewood Studios and recalled how one of the film's producers was "horrified" that he would leave it alone in coffee shops.
"I carried it around and used it for nothing except writing the script. I kept it in a safe at Pinewood Studios. I think my producer was constantly horrified I would leave it in a coffee shop."
Now that Johnson is spearheading the next Star Wars trilogy, it's safe to assume that Disney doesn't mind him spilling these details. While they are a bit extreme, Johnson doesn't seem bothered by these actions. The fact that he's helping make the next three movies shows he's more than okay with his Disney deal.
Star Wars: The Last Jedi will be coming to home video soon. In the meantime, we have Solo: A Star Wars Story coming out in May.