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  2. Fix security certificate error messages in Internet Explorer

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

    Seeing security certificate errors when visiting certain websites? Learn how to remedy this issue in Internet Explorer. AOL APP. News / Email / Weather / Video. GET.

  3. Cisco Systems VPN Client - Wikipedia

    en.wikipedia.org/wiki/Cisco_Systems_VPN_Client

    On July 29, 2011, Cisco announced the end of life of the product. No further product updates were released after July 30, 2012, and support ceased on July 29, 2014. [4] The Support page with documentation links was taken down on July 30, 2016, replaced with an Obsolete Status Notification. [5] It was succeeded by Cisco AnyConnect Secure ...

  4. Certificate revocation list - Wikipedia

    en.wikipedia.org/wiki/Certificate_revocation_list

    The necessity of consulting a CRL (or other certificate status service) prior to accepting a certificate raises a potential denial-of-service attack against the PKI. If acceptance of a certificate fails in the absence of an available valid CRL, then no operations depending upon certificate acceptance can take place.

  5. Online Certificate Status Protocol - Wikipedia

    en.wikipedia.org/wiki/Online_Certificate_Status...

    Alice and Bob have public key certificates issued by Carol, the certificate authority (CA). Alice wishes to perform a transaction with Bob and sends him her public key certificate. Bob, concerned that Alice's private key may have been compromised, creates an 'OCSP request' that contains Alice's certificate serial number and sends it to Carol.

  6. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The request has been fulfilled, resulting in the creation of a new resource. [6] 202 Accepted The request has been accepted for processing, but the processing has not been completed. The request might or might not be eventually acted upon, and may be disallowed when processing occurs. 203 Non-Authoritative Information (since HTTP/1.1)

  7. Certificate Transparency - Wikipedia

    en.wikipedia.org/wiki/Certificate_Transparency

    Certificate Transparency (CT) is an Internet security standard for monitoring and auditing the issuance of digital certificates. [1] When an internet user interacts with a website, a trusted third party is needed for assurance that the website is legitimate and that the website's encryption key is valid.

  8. Certificate revocation - Wikipedia

    en.wikipedia.org/wiki/Certificate_revocation

    Certificate revocation is "an important tool" for dealing with attacks and accidental compromises. RFC 9325 places a normative requirement on TLS implementations to have some means of distrusting certificates. [9]

  9. Server Name Indication - Wikipedia

    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.