https://lists.w3.org/Archives/Public/public-rww/2012Aug/0035.html
Re: Fwd: wwwhisper project announcement (#ACL & https://login.persona.org) from elf Pavlik on...
https://elements.heroku.com/addons/wwwhisper/
wwwhisper - Add-ons - Heroku Elements
Plug and play access control for your app.
add onsherokuelements