The Two step verification process is a feature of Gmail that allows you to add an extra layer of security to your email account. If you enable the two step verification, whenever you check into a Google account from a new place such as a new browser or a mobile phone, you will have to enter a security code, apart from your password. Thus even if a hacker gets hold of your password, he may not be able to login to your account.
Here’s how you can enable it.
First sign in to your Google account. Now go to the Account Settings page by clicking your name in the Google Homepage and selecting Account Settings. Under Personal Security, next to Security you can see “Using 2-step verification”. Click it.
You will be taken to an introductory page that lists the steps to set up the 2-step verification. Click Set up 2-step verification.
Now you will have to choose how you want to receive your verification codes. You can receive it through text message/voice call or via an app which is available for iPhone, Android and Blackberry.
I have chosen text message here. Then you will have to enter the necessary details such as the country you live in and the mobile number. Click Send code once you have entered all the details.
If you chose any of the available apps, you have to first download the app from the appropriate App store (or m.google.com/authenticator in case of Blackberry).
With Android or iPhone, you can scan the QR code and to generate the verification code. For Blackberry, after you install the app, you have to enter a manual key that will be provided along with your account name and it will generate a verification code. Once you have the code, type it in the respective box and click Verify.
Next step is to set up a backup option. You can add another phone as your backup in case your primary phone is stolen or lost. Once you are finished you will be prompted to create application specific password if you are using different applications such as Picasa, Ad words editor etc. Click next.
Now click Turn on 2-step verification. You will be signed out on all locations. Next time, after you login, the below screen will be shown. You will get the verification code as text message or voice mail if you chose that option or you can generate a code using your mobile phone app. Enter the obtained code in the box next to Enter Code and click verify and you’re done.
You can make Google remember the verification for that computer or phone for 30 days if you wish so by checking the box as shown above.