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  2. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    Personal identification number. A personal identification number (PIN), PIN code, or sometimes redundantly a PIN number, 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 in ...

  3. Personal unblocking key - Wikipedia

    en.wikipedia.org/wiki/Personal_unblocking_key

    A personal unblocking key (PUK), sometimes called personal unblocking code (PUC), is used in SIM cards to reset a personal identification number (PIN) that has been lost or forgotten. Most mobile phones offer the feature of PIN protection. After switching on the phone, if the PIN security function is active, the user is required to enter a 4-8 ...

  4. Multi-factor authentication - Wikipedia

    en.wikipedia.org/wiki/Multi-factor_authentication

    Account recovery typically bypasses mobile-phone two-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.

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

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

    1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. Add or disable 2-step verification for extra security. Add an extra security step to sign into your account with 2-step verification. Find out how to turn on 2-step verification and receive a verification code, and ...

  6. Fix problems signing into your AOL account - AOL Help

    help.aol.com/articles/help-signing-in

    Call paid premium support at 1-800-358-4860 to get live expert help from AOL Customer Care. Having trouble signing in? Find out how to identify and correct common sign-in issues like problems with your username and password, account locks, looping logins, and other account access errors.

  7. Transaction authentication number - Wikipedia

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

    A ChipTAN generator is not tied to a particular account; instead, the user must insert their bank card during use. The TAN generated is specific to the bank card as well as to the current transaction details. There are two variants: In the older variant, the transaction details (at least amount and account number) must be entered manually.

  8. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    A card security code (CSC; also known as CVC, CVV, or several other names) is a series of numbers that, in addition to the bank card number, is printed (but not embossed) on a credit or debit card. The CSC is used as a security feature for card not present transactions, where a personal identification number (PIN) cannot be manually entered by ...

  9. 2-Step Verification with a Security Key - AOL Help

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

    When you get your Security Key back or get a new key, you can re-enable 2-Step Verification in your. Still need help? Call paid premium support at 1-800-358-4860 to get live expert help from AOL Customer Care. A security key is a physical device that gets uniquely associated with your AOL account after you enable it.