Google has introduced 2-step verification which enhances the security in a great way, with 2 step verification , login is done in two steps a user sign’s in with username and password and in second step a verification code is sent to user’s mobile through sms/phone call , after the entering the verification code the user is logged in.
Why use of 2 step verification
It protects your account from unauthorized access. If your password is cracked, guessed or hacked by someone after that he/she cannot access your account without verification code. One who have that verification code that person can sign in in your account. That means only owner of that account can access that account.
1. You have to register your mobile number with your gmail account.
2. If you are using an Android, BlackBerry, or iPhone, these devices use the Google Authenticate mobile app to generate the verification code.
3. 2-step verification is only available in US English in the next-generation version of the Google Apps administrator control panel.
How to enable it?
2. Under personal setting click use 2-step verification.
3. Then select how you want to receive your verification code.( text message or phone call)
4. Next time you sign in your account after you entered your password hit on the sign in button. Then it prompts the verification code window.
5. If suppose you lost your mobile then you can sign in with your backup codes. Which you have to set when you enable your 2 step verification.
Signing in to mobile devices with application specific password
Once your users enroll in 2-step verification, they may need to use application specific password in addition to their verification codes. For installed applications that don’t have a 2-step verification field, your users will need to enter an application-specific password once per device or application in place of their regular password to access their Google Account.
Common devices and applications that require application-specific passwords are: Gmail and Google Calendar on Android-based phones, ActiveSync for Windows Mobile and iPhone, and IMAP clients such as Thunderbird.