I didn't know it was even finished at this point yet... so right now, if anything, it would be less secure than NTFS. However, once it's "completed," it will probably be about on par with NTFS. Filesystem security is basically a joke unless you have hardware security too, because unless something's encrypted (and then it doesn't matter what filesystem it's on), you can take the drive out of the machine, load it into a different one as slave or secondary drive, log in as Administrator, take ownership, and view anything you damn well please.