To enable two-factor authentication, go to this URL – on your computer (you will be prompted to login, if you haven’t logged in).Dropbox plans to enable the feature for all users in the next few days. They’ve released what they call the ‘experimental build’ to their forum users so the feature could still be in beta, so do proceed with caution. Important: Dropbox hasn’t officially launched it. So if you want to add an extra layer of protection to your Dropbox account then follow these step-by-step instructions to enable two-factor authentication: If you were eagerly waiting for the two-factor authentication then the good news is that DropBox seems to have quietly launched it to their Forum users to try it out. Dropbox announced that it would be adding security features such as two-factor authentication etc. It's very rare that a site will ever give you the secret for a second time, generally the best you can do is get in some other way, disable 2FA and re-enable it with a new secret.If you’re a Dropbox user, you may have heard about the hacking incident few weeks back. If you can't get the database from authenticator, then you have no choice but to use whatever mechanism is available for each site. You'll get a table with the secrets, counters, etc., that you need to use. You can open that up with sqlite3.exe or any SQLite UI. It's under: data\.authenticator2\databases\databases If you didn't save the secrets, your only option is to recover the database from the application, either from a backup or directly from the device. If you have any "counter" based codes, you'll need to know how many times you used it, which could be problematic, but those are fairly rare. Turn that into a QR-code and Authenticator will scan it.
If you saved the secret keys you're given, which is a good idea as long as they're secure and separate from your passwords, you can re-enter them on a new phone by finding a secure QR-code generator (a local or JS-based one that doesn't send the data to any server) and formatting each one like this: otpauth://totp/LABEL:USERNAME?secret=SECRET&issuer=ISSUER&counter=N
The one time I tried that it just made Authenticator crash on startup. If you have a backup application, you may be able to back up the app's data, sync it to the cloud, and restore it on the other device.
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