Certificate Authority. The Certificate Authority (commonly known as a CA) is a third party organisation that is responsible for verifying the information in the server&#39;s certificate (including its DNS hostname). The CA should only sign the certificate if it has been able to confirm that the server operator does indeed have control of the server associated with its DNS hostname and that the server operator has control of the private key.</p>

<p>In this way, if the client trusts the CA that has signed th