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2. What's a six-digit verification code — and why you should ...

   www.aol.com/whats-six-digit-verification-code...

   Six-digit verification codes are a form of two-factor authentication, a process that helps keep your important online accounts secure. For example, you might get a text message or email with a six ...

3. Help:Two-factor authentication - Wikipedia

   en.wikipedia.org/wiki/Help:Two-factor_authentication

   Because the verification code is time-based, it may change while you're doing this, in which case you'll have to add the latest code instead. The application will normally indicate when a code is about to expire (e.g. in Google Authenticator, the code's colour changes from blue to red). If you need to use a scratch code, enter it in place of ...

4. Add or disable 2-step verification for extra security - AOL Help

   help.aol.com/articles/2-step-verification...

   2. Next to "2-Step Verification," click Turn on 2SV. 3. Click Get started. 4. Select Authenticator app for your 2-step verification method.-To see this option, you'll need to have at least 2 recovery methods on your account . 5. Click Continue. 6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your ...

5. Multi-factor authentication - Wikipedia

   en.wikipedia.org/wiki/Multi-factor_authentication

   [2] [failed verification] Modern smartphones are used both for receiving email and SMS. So if the phone is lost or stolen and is not protected by a password or biometric, all accounts for which the email is the key can be hacked as the phone can receive the second factor. Mobile carriers may charge the user messaging fees.

6. Personal identification number - Wikipedia

   en.wikipedia.org/wiki/Personal_identification_number

   It allowed the customer to type in a secret code, which is transformed by the device, using a microprocessor, into another code for the teller. [16] During a transaction, the customer's account number was read by the card reader. This process replaced manual entry and avoided possible key stroke errors.

7. How to stop scammers from coming after your verification ...

   www.aol.com/stop-scammers-coming-verification...

   When you log into your bank, credit card, or other online account (Amazon, your health insurance website, etc.), you might receive a text message or email containing a verification code.