Need for SSL

I have added a Members Only section to my site, and on it I created an article that links to a PDF rendition of our Excel-based membership directory. The PDF file itself was uploaded via the JCE File Browser. I renamed the file with a 40-character random string to significantly minimizing the chances of someone "accidentally" finding this file. (The document repository where the JCE File Browser dumps the files is accessible by "public".)

Without SSL, though, anyone in position to monitor web traffic would see the URL to this file in the clear. More dangerous, however, is that the user logins and passwords are sent in the clear, as are the admin login and password. The use of SSL would make all of this more secure.

Is there a way to add SSL, particularly for the more security vulnerable tasks?