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  2. How to Recover a Hacked Facebook Account - AOL

    www.aol.com/recover-hacked-facebook-account...

    The “Password and Security” page also includes a list titled “Where You’re Logged in.”. If there’s a log-in that you don’t recognize, follow these steps: Click on the suspicious log ...

  3. Why am I asked to verify my account after signing in?

    help.aol.com/articles/why-am-i-asked-to-verify...

    You may be prompted to get a verification code at your recovery phone number or recovery email address for any of the following reasons:

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

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

    -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 authenticator app. 9. Click Done. Sign in with 2-step for authenticator app. 1. Sign in to your AOL account with your password. 2.

  5. Add, replace or remove AOL account recovery info - AOL Help

    help.aol.com/articles/add-or-update-aol-account...

    Call paid premium support at 1-800-358-4860 to get live expert help from AOL Customer Care. Find out how to add or delete a recovery mobile phone number or alternate email address from your AOL account.

  6. Message authentication - Wikipedia

    en.wikipedia.org/wiki/Message_authentication

    The message authentication code, also known as digital authenticator, is used as an integrity check based on a secret key shared by two parties to authenticate information transmitted between them. [4] It is based on using a cryptographic hash or symmetric encryption algorithm. [5] The authentication key is only shared by exactly two parties (e ...

  7. HMAC - Wikipedia

    en.wikipedia.org/wiki/HMAC

    In cryptography, an HMAC (sometimes expanded as either keyed-hash message authentication code or hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key. As with any MAC, it may be used to simultaneously verify both the data integrity ...

  8. Multi-factor authentication - Wikipedia

    en.wikipedia.org/wiki/Multi-factor_authentication

    Multi-factor authentication ( MFA; two-factor authentication, or 2FA, along with similar terms) is an electronic authentication method in which a user is granted access to a website or application only after successfully presenting two or more pieces of evidence (or factors) to an authentication mechanism. MFA protects personal data —which ...

  9. The people who need extra security the most -- the careless types who reuse passwords and leave their PCs unsecured -- are the least likely to put enhanced features in place. "If banks make it ...

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