There are plenty of security measures to keep your online files safe, but they frequently diminish or disappear when you're actually using those files. What if someone tries to swipe your data while you're working on it? Microsoft thinks it can help. It just unveiled VC3 (Verifiable Confidential Cloud Computing), a system that keeps your info secure at virtually every step. Whenever you open content, it's sent to a locked down device which limits access to you and you alone -- theoretically, this prevents even insiders (such as coworkers, cloud providers or government spies) from intercepting your secrets.