Custom Clock and RSS feeds.

I've been trying to configure custom clock to display a news feed.

It appears it won't work with secured (https) rss feeds.

The few feeds that actually work are all plain http.

Problem is, unsecured rss feeds are becoming scarce. All the useful feeds are secured.

Am I right in understanding that only non secured rss feeds work?

Where is the limitation coming from?

Is there any way around it?

Thanks for any upcoming information