Like Colin mentioned you will need to get a publicly signed cert and replace the securelogin cert on the controller if you want to use https.
The only other option is you could export the cert and manually import it into the device but you will need to do that for everyone.
A default Cert should only be a placeholder for a true cert. In all of the documents it states that you should replace the default cert for a true https connection.
Would you want to connect to a website that gave you a cert warning. I know I wouldn't. :)