The recent security such hacking of journalist's hacked iCloud account are just reminder that security can be compromised if not maintained.
Two-step verification (also called two-factor verification) drastically reduces the chances of having the your Dropbox data accessed by someone else. Why? Because hackers would have to not only get your password and your username, they'd have to get a hold of your phone.
So in order to login with the two-step verification, you must enter both a password and a temporary code that is sent to your phone. Both are required to gain access to the account.
If you choose SMS as your method of receiving codes, you'll just need to provide your mobile number. This is the simplest option and does not require an authenticator apps (like Google Authenticator) that Dropbox supports.
In the case of mobile authenticators, you will need to install Google Authenticator to your smartphone and configure it so it can work with your Dropbox account. For example, in Google Authenticator, just tap the Settings button on your device, then choose Add Account. From there use either the Scan or Manual option, whichever best fits your needs. Your Dropbox security code will appear as another entry in your authenticator app.
An even more important method of protecting your information is to replicate your data and back it up to another cloud service. Relying on just one file storage solution and service is a dangerous way to handling your data and files. At the very least, Dropbox servers could go down and leave you unable to gain access to your information for hours. At worst, your data could be lost due to user accident or a software bug—or even maliciously deleted even despite your efforts to secure your account.
So backup and sync your files from Dropbox to Google Drive, Box, or SugarSync using cloudHQ.