I'm planning to migrate all links on a site from HTTP to HTTPS in the near future. However, at the moment all I want to do is to enable HTTPS in order for it to be used on certain private areas of the site.
I've configured a new virtual host with the SSL certificates and the site now supports HTTPS. The old non-HTTPS URLs are working fine, too.
As it stands now, for the time being I don't want to issue any SEO-related changes therefore I haven't configured any 301 redirects to the new HTTPS URLs. Is there anything else I need to take care of in order for the HTTPS version of the site to remain invisible to search engines? I'd like to prepare for the migration and only issue the redirects when I'm ready.