Plex have announced they are adding HTTPS encryption to Plex Media Servers so you get end to end encryption between your own Plex server and the your Plex apps (including Android, Roku, browser, Windows and Plex Home Theater).
To make your server secure they are providing DigiCert SSL certificates for your media server whether you are a Plex Pass subscriber or not. To get HTTPS support you need the latest version of the Plex server (0.9.12.3) and one of the support client apps. A good move by Plex.
Read more on Plex.tv’s blog.
So what do you have to do? Well, update to the latest release (v0.9.12.3), and make sure you’re signed in. Also, check out our support article on the topic. We’ve silently pushed support for secure connections to Android, Roku (Preview app), the web app, Windows, and Plex Home Theater. (Gaming consoles and Smart TVs coming soon, and iOS is wrapping up a major release which includes full support for secure connections.)
Since all servers won’t update at the same time, we make it clear with a green lock which servers are secure.