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  2. 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.

  3. Multi-factor authentication - Wikipedia

    en.wikipedia.org/wiki/Multi-factor_authentication

    To authenticate, people can use their personal access codes to the device (i.e. something that only the individual user knows) plus a one-time-valid, dynamic passcode, typically consisting of 4 to 6 digits. The passcode can be sent to their mobile device by SMS or can be generated by a one-time passcode-generator app. In both cases, the ...

  4. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    Luhn algorithm. The Luhn algorithm or Luhn formula, also known as the " modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers. It is described in U.S. Patent No. 2,950,048, granted on August 23, 1960.

  5. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    Personal identification number. A personal identification number ( PIN ), or sometimes redundantly a PIN number or PIN code, is a numeric (sometimes alpha-numeric) passcode used in the process of authenticating a user accessing a system. The PIN has been the key to facilitating the private data exchange between different data-processing centers ...

  6. Confirmation code - Wikipedia

    en.wikipedia.org/wiki/Confirmation_code

    Confirmation code. A confirmation code is a short piece of data (code, cypher) that is used for purposes of confirmation of a particular attribute or property such as personally identifiable information. CAPTCHA - a computing scheme used to identity an entity as a human being and not a program, employing the current differences in text ...

  7. Record locator - Wikipedia

    en.wikipedia.org/wiki/Record_locator

    Record locator. In airline reservation systems, a record locator is an alphanumeric or alpha code used to identify and access a specific record on an airline’s reservation system. An airline’s reservation system automatically generates a unique record locator whenever a customer makes a reservation or booking, commonly known in the industry ...

  8. VAT identification number - Wikipedia

    en.wikipedia.org/wiki/VAT_identification_number

    12 digit number (E.g. 123 456 789 002), of which the first digit identifies type of taxpayer (0 for corporations, 1-9 for individuals and other businesses), second to eighth digits are sequential numbers between 0 and 9, ninth digit is a check number, last three digits are 000 for individuals and head office of businesses and 001-999 for ...

  9. History of Facebook - Wikipedia

    en.wikipedia.org/wiki/History_of_Facebook

    Facebook was then opened on September 26, 2006, to everyone aged 13 and older with a valid email address. [7] [8] Late in 2007, Facebook had 100,000 business pages, allowing companies to attract potential customers and tell about themselves.