Does anyone have any idea how to make an RSS feed generated by XOOPS (or any modules) secure?

I have a site with multiple forums, not all of which any particular user has access to. I would like to be able to publish an RSS feed of the latest posts for each forum. The problem is that anyone can read the RSS feeds if they know or can deduce the address.

I'd also like to set up an RSS feed for each user's PMs. This would obviously need to be secure, but that is a project for another time.

By default RSS syndication is a public transmission. Not much in the way of security for rss feeds exist. I did find This Webpage that might be of interest to you.

HTH.