GmaiL Security
Two step Verification
Login to your Gmail account
click on Account

goto Security > >Click on 2-Step verification >>click on EDIT

give your mobile number tats it....
whenever you login into your accout a key is sent to your mobile
account will be active if and only if when you enter the key !!!
if you have logined from the trusted computer then you can remember it for 30days
by cliking on dialog box below the key

Posted in: Social Networks