A Security Certificate is a file on a server, which establishes the identity/authenticity of the website or app being served. A security certificate is required to provide secure web pages that start with HTTPS://. Also called a Secure Socket Layer [SSL] certificate or a "digital certificate". These digital certificates must be periodically renewed. An out-of-date security certificate, or one with errors in it, will cause browsers to decline to go there.
Celebrating 25 Years of Creating an Island of Stability In the Sea of Online Confusion
