Google Drive is built around collaboration. And that's great! However, you probably don't want to give collaborators unfettered access to everything -- what if someone makes off with a sensitive report? Thankfully, you can put your foot down as of today. Google has added rights management to Drive that, if you like, prevents others from copying, downloading or printing specific files. You only need to mark a checkbox to prevent coworkers and friends from sharing your work with others. The feature is gradually rolling out now on the web. There's no word on whether or not it'll reach phones, so don't count on locking down your files while you're on the road.