Can the entire PBWiki be secure from public viewing?

Can a PBWiki for business be secure from public viewing in its entirety, requiring login to even see the contents or owners? I wish to collaborate with numerous remote colleagues, but can not allow any content beyond the URL to be visible outside of the secure group of contributors, unless they've logged in.
 
indifferent I’m undecided
Inappropriate?
2 people have this question
User_default_medium