User Images in Classroom and Schoolwork

New Contributor

I have a working test system to add the user images to Apple Classroom, however SSL configuration is new to me and as regards photos of students security is very important.
Is a self signed cert on the server hosting the photos secure enough?
The photos cannot be accessed by URL in a browser. Aside from standard hardening for a web server like using a firewall are there any additional steps I can take to keep the data secure?