One of the simplest ways to have a secure site is to use the server’s built-in self-generated certificate. The following provides an introduction to using the server’s default shared certificate.
Understanding non-Trusted Certificates
Although non-Trusted certificates provide a high level of encryption, they are not always the best choice because they are self-generated instead of purchased from a trusted authority. Because of this, visitors to your site may receive a warning popup window when they access a secure page.
If you can put up with this inconvenience, then a self-generated secure certificate is adequate for your site. If you are a company selling goods or services, we highly recommend that you purchase a trusted certificate. A non-trusted certificate may be harmful to a web site’s reputation.
To use the server’s shared certificate, do the following: