security with flexbackup

[BosHaus]

I was working on setting up flexbackup on my system, but flexbackup always makes the archives world readable. THis doesn't seem to be very safe as I was able to log in as a normal user, untar all the files and read any file in my /etc. Is there any way around this to make a more secure? As long as anyone knows the directory name I'm backing up to they can just look at the and get all the files.