Advertisers, governments, hackers and cyber-criminals are all trying to grab your personal information online. They track the sites you visit, your browsing habits and what you buy.

Wouldn't it be nice if you could just go about your online business anonymously? Well, you can with a system called Tails.

Warning: While this is a powerful tool, nothing is completely secure and law enforcement has a lot of online and offline resources to track down criminals. Do not use this tool for illegal activities; you will be caught.

Tails stands for The Amnesiac Incognito Live System. Unlike most security programs, you don't install it on your computer. Instead, you install it on a DVD or USB flash drive and carry it with you.

When you want to use a public computer, or any computer that's potentially unsecured, just pop it in. When you reboot the computer, Tails will boot instead of the computer's usual operating system.

When you're using Tails, all your Internet traffic goes through the Tor network, an anonymous network designed by the U.S. Naval Research Laboratory. This makes it hard for anyone to see what sites you're visiting.