I mean to put a password to access your WordPress , so that only those with access to the key fits all, thereby making your website private.
Password protected and, once active, set a password to give it to whoever you want to access and view your website. All other users will be redirected directly to the login screen where you are asked that password, and can not see anything else.
As additional bonuses can also enable the password to view RSS feeds or bookmark the site and hidden from the search engines.
Simple and effective, ideal for private sites, for the family, production sites and stuff. The only danger, as always in these things, pointing the password on a post it and I screwed up the invention of privacy.