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  2. Transaction authentication number - Wikipedia

    en.wikipedia.org/wiki/Transaction_authentication...

    A transaction authentication number (TAN) is used by some online banking services as a form of single use one-time passwords (OTPs) to authorize financial transactions. TANs are a second layer of security above and beyond the traditional single-password authentication .

  3. 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 ...

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

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

    6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your authenticator app. 9. Click Done. Sign in with 2-step for authenticator app. 1. Sign in to your AOL account with your password. 2. Enter the verification code shown in your authenticator app. 3. Click Verify.

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

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

    Keep the code private, use it to log in, then delete it. If you’re worried there's a problem with your account, reach out directly to the entity that houses your account (bank, credit union ...

  6. Help:Two-factor authentication - Wikipedia

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

    For the iOS and Android versions of the mobile app, when prompted for the verification code, you'll need to follow a similar process to the web interface. If you need to use a scratch code, first choose to use a backup code, and then enter the scratch code. Scratch codes are case-sensitive and must be entered in all caps.

  7. Security token - Wikipedia

    en.wikipedia.org/wiki/Security_token

    Example of keypad issued by a bank. All tokens contain some secret information used to prove identity. There are four different ways in which this information can be used: Static password token The device contains a password that is physically hidden (not visible to the possessor), but is transmitted for each authentication.

  8. One-time password - Wikipedia

    en.wikipedia.org/wiki/One-time_password

    MasterCard SecureCode uses OTAC to confirm a user's identity One time authorization code as used in Yammer's desktop client. A one-time password (OTP), also known as a one-time PIN, one-time passcode, one-time authorization code (OTAC) or dynamic password, is a password that is valid for only one login session or transaction, on a computer system or other digital device.

  9. ISO 8583 - Wikipedia

    en.wikipedia.org/wiki/ISO_8583

    Message authentication code (MAC) 65: b 1: ... Bank not supported by switch 32: ... Authentication and verification done ...