Not at the moment. Since framed redirects were deprecated we have begun work on fully supporting custom domains including SSL certificates with SNI. We will publish this update as soon as it becomes available. No sensitive data is transmitted to the Redirection Domain, as it immediately serves a 301 redirection to your actual Internal Domain.
Integrations - Enabling Web Access - Custom Domains FAQ - Can We Use HTTPS or an SSL Certificate on the Redirection Domain?
