Unreadable links don't work (tested with MediaWiki 1.14.0, SS 4.3.0 or 4.4.3).
See http://www.mediawiki.org/wiki/Extension_talk:SimpleSecurity#Unreadable_links_not_working ; http://www.mediawiki.org/w/index.php?title=Extension:SimpleSecurity&oldid=337659#Unreadable_links says "Still has some bugs to iron out".
Version: unspecified
Severity: enhancement