You may have been exposed to web site, or host, certificates if you have ever clicked on the padlock in your browser or, when visiting a web site, have been presented with a dialog box claiming that there is an error with the name or date on the certificate. Understanding what these certificates are may help you protect your privacy.
What are web site certificates?
If an organization wants to have a secure web site that uses encryption, it needs to obtain a site, or host, certificate. There are two elements that indicate that a site uses encryption: