Google now supports two-step verification of your identity, a welcome increase in security over a simple password-based model. Secure your account using a password plus verification via phone, txt, or smartphone application.
Two-factor security, for the unfamiliar, is simply a way for a service provider to double verify your identity. Google explains how it will work with your account:
Once you enable 2-step verification, you’ll see an extra page that prompts you for a code when you sign in to your account. After entering your password, Google will call you with the code, send you an SMS message or give you the choice to generate the code for yourself using a mobile application on your Android, BlackBerry or iPhone device. The choice is up to you. When you enter this code after correctly submitting your password we’ll have a pretty good idea that the person signing in is actually you.
Hit up the link below to read more and set up your account for two-factor verification.
Advanced Sign-In Security for Your Google Account [The Official Google Blog]