This is very possible to do. I think you might want to have two extensions to provide this. The first extension to provide http authentication (under ssl) to eZ publish, the second extension to use the first extension to provide rss feeds after successful http authentication.
I guess you could do all of this in one extension but these two extensions would be very useful to the community as a whole.
Maybe it would work to use the HTTP auth provided by the webserver?. That way, most clients can use it easily access it using https://user:password@url/
Thinking of it, I have that somewhere. But the whole site is HTTP Auth protected. Your job is now to limit .htaccess to the feed URL I guess ;)
I know for a fact that mozilla's thunderbird client supports http authentication (Since, 1.0 RC1)
In fact I really think http authentication a feature (and sign) of a serious rss client / reader.
I'm not going list them here but just a little searching for "rss client http authentication" will show you a number of them.
The one that does not support http authentication that still bothers me is Google's Reader, though I'm sure that it is only a matter of time before it is supported.
//kracker Sage Francis - Personal Journals - Climb Trees
Thanks for your posts.
In my case, the Client would be ezPublish ;) while the server would be Lotus Notes Domino. The Server definitly can "protect" the RSS feed (which will be defined as a "view") with user/pw. Usually, it will produce a web login form, but i hope, it will accept basic http authentication, too. Does the ezPublish RSS Client support authentication? (Currently, i have an old 3.4 version, which does not, afaik).