How to secure the file server?

Question

PHP

There is a remote server for images, images are sent via cUrl, how can you secure the server, because the token can be intercepted, and the referer can be done?

Answer 1

https will help you ...
as an option - on a file server, set up a web server on a non-standard port, it accepts the name and path to the file.
then the file server connects via ssh using the key and fetches the files.