On the app side, look at the manufacturer page and reviews before you install or update an application. It's also worth spending an extra minute to check out viaForensics, a site that runs security tests on popular apps and rates them. And set permissions cautiously: If an app requests access to your contacts, ask yourself why. Finally, for an added layer of security, download an encryption app, like Firebox ($6 for iPhone) or APG (free for Android). They encode passwords, files and other information, then require a security key for access.