Two-factor authentication for the Dropbox setup
Similar to Twitter, Dropbox offers also the possibility of the security code via SMS or App to send.
- First, go to the Dropbox Website and log in.
- Click to the right of your name in the Drop-Down menu to "settings" and go to the new window, click the menu item "security".
- Click on "two-step Verification" on Enabling and follow the steps. You can choose between the App and the phone number.
- First, you can specify your Primary phone number. This you can confirm this via SMS sent to Code.
- On request, you can specify a second number in case of emergency, to continue to access your account.
- Finally you will receive a random recovery code that allows you to authenticate without Two factors.

Dropbox: Two-Step Verification