Continuation to the BlogPost on issuing or configuring SQL Servers to use certificates, I have found useful reference on Technet blogs - Mr. Cert’s side of the story ....(read more)

You may be aware that using SSL communications a HTTP server can have encryption for us, in this regard certificates must be authorized for server authentication. Microsoft recommends that you can do this by either obtaining an SSL certificate from a certificate-issuing authority, such as Verisign, or if for testing purposes, by using tools to ...