That code might come from an app like Google Authenticator or Authy, or it might come from a text message that the service sends you. After you enter a password, you're asked to enter a code that shows up on your phone. When you sign into a site or app, it asks for your password. While that can be something like a smart card or USB key, for most people it's their smart phone. If your backup was not encrypted, I dont know if it would save the codes since it generally doesnt save passwords (in their vague wording). I had my Google Authenticator codes on my phone again after the wipe. The something you have is a physical thing you own. I created an encrypted backup in iTunes, wiped my iPhone, and restored from that backup. Scan the QR code by using your devices camera. ![]() In most apps, you can do this by tapping the + icon. Enter your password, and click Use an app to retrieve authentication codes from the authentication app on your device. Then, click Set Up Two-Factor Authentication. The two factors that the name refer to are generally identified as something you know and something you have. The something you know is your password or passcode. Next to Two-factor Authentication, click Expand. Put simply, 2FA gives you additional security for an account over just using your password. But if you have it enabled on your Apple or Google accounts, this could really come back to bite you in the worst way. Two factor authentication (2FA) is generally a great security tool. What You Can Do to Protect Your Accounts Right Now.Backup codes must be printed or written down which makes them more vulnerable to theft and phishing. ![]() However, backup codes are the least secure option for two-factor authentication. iOS options: Google Authenticator, Authy, LastPass, 1Password. When is Two Factor Authentication a Problem? Android options: Google Authenticator, Authy, LastPass, 1Password.
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