If someone at Apple is reading this... please fork it (or built up from scratch) a solid open source SSO system and become an official (but optional) identity provider for your millions customers.<p>This would be a win-win as this could help AppleID and TouchID becoming even more central for your users while demonstrating at the same time that you care about privacy and are willing to develop an open standard to support strong and distributed identity management system as an alternative to Google and Facebook centralized and privacy unfriendly solution.