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  2. Fix security certificate error messages in Internet Explorer

    https://help.aol.com/articles/message-the-security...

    While Internet Explorer may still work with some AOL products and services, it's no longer supported by Microsoft and can't be updated. Because of this, we recommend you download a supported browser for a more reliable and secure experience online.

  3. List of HTTP status codes - Wikipedia

    https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

    This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.

  4. Server Name Indication - Wikipedia

    https://en.wikipedia.org/wiki/Server_Name_Indication

    In more detail, when making a TLS connection, the client requests a digital certificate from the web server. Once the server sends the certificate, the client examines it and compares the name it was trying to connect to with the name(s) included in the certificate. If a match occurs, the connection proceeds as normal.

  5. Online Certificate Status Protocol - Wikipedia

    https://en.wikipedia.org/wiki/Online_Certificate_Status...

    The OCSP responder uses the certificate serial number to look up the revocation status of Alice's certificate. The OCSP responder looks in a CA database that Carol maintains. In this scenario, Carol's CA database is the only trusted location where a compromise to Alice's certificate would be recorded.

  6. HTTPS - Wikipedia

    https://en.wikipedia.org/wiki/HTTPS

    A certificate may be revoked before it expires, for example because the secrecy of the private key has been compromised. Newer versions of popular browsers such as Firefox, [32] Opera, [33] and Internet Explorer on Windows Vista [34] implement the Online Certificate Status Protocol (OCSP) to verify that this is not

  7. Troubleshoot a broadband internet connection - AOL Help

    https://help.aol.com/articles/troubleshooting-a...

    If you're using broadband (cable) internet and you can't connect, try the following troubleshooting steps in the order listed until you get up and running again. 1. Check if you can visit other sites with a different browser - If you can go to another site, the problem may be associated the browser you're using.

  8. HTTP Public Key Pinning - Wikipedia

    https://en.wikipedia.org/wiki/HTTP_Public_Key_Pinning

    The HPKP is not valid without this backup key (a backup key is defined as a public key not present in the current certificate chain). [4] HPKP is standardized in RFC 7469. [1] It expands on static certificate pinning, which hardcodes public key hashes of well-known websites or services within web browsers and applications. [5]

  9. HTTP Strict Transport Security - Wikipedia

    https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security

    HSTS addresses this problem [2]: §2.4 by informing the browser that connections to the site should always use TLS/SSL. The HSTS header can be stripped by the attacker if this is the user's first visit. Google Chrome, Mozilla Firefox, Internet Explorer, and Microsoft Edge attempt to limit this problem by including a "pre-loaded" list of HSTS sites.