A “Certificate Authority” (CA), is a idea of “Public Key Infrastructure” (PKI), in which a special type of certificate is able to essentially co-sign other certificates to verify them as valid and trustworthy to certain levels.
Although CAs are generally trusted, there are non-trusted CAs. These CAs typically exist in corporate networks, in which their computers trust the CA, but others don’t. For example, a large company will have internal servers that need to be secured using SSL/TLS, but since nobody outside of the company ever accesses these systems, no computers outside of the company trusts this CA.
Continue reading All About Certificate Authorities