Something everyone has been eagerly waiting for. You can now secure userr Dropbox account using 2-step verification meaning an intruder would need more than just userr password to access any of the confidential files stored in userr Dropbox folders.
Secure Dropbox Account
                                                                 Enable 2-step verification to secure userr Dropbox Account
The 2-Step verification system of Dropbox is pretty similar to that of Google.
You can either choose to receive the 6-digit security codes on userr mobile phone via text messages (Dropbox supports international phone numbers too) or if user have a smartphone (Android, BlackBerry, iOS or Windows Phone), user can get the Authenticator app and generate time-sensitive codes locally on the phone itself.
To get started, go to userr Dropbox account’s security page and Enable two-step verification – the setting is available right at the bottom of the page. Now follow the wizard to associate userr phone (or phone number) with the security option. Dropbox will also provide an emergency backup code that user should print and keep at a secure place – this will be required if user ever lose userr mobile phone and need to get into Dropbox sidestepping the security settings.
Once 2-step authentication is enabled, go to dropbox.com and get the latest installers for Dropbox (available for Windows, Mac and Linux). There aren’t any new features here except that these new software builds include support for signing-in through 2-step verification.
Also, if user have setup Dropbox on userr mobile phones and tablets, it maybe a good idea to unlink all these devices from userr Dropbox account and relink – all these device will now require a 6-digit code that is only available on userr mobile phone. And whenever a new computer, phone or tablet is used to log into userr Dropbox account, user also get an instant email notification.

Safely keep userr emergency Dropbox Code because user never know when user may need it.