The security will be determined by your web of connections and the quality of their profile providers. For such a system to be functional and have sufficient appeal to 3rd parties such as Google and other systems that will want to crawl the graph, a certain portion will have to be open. Things like your name and connections to others.
Ultimately, a larger subset of your data will eventually become public. This will happen by users installing games and other apps on top of the system that aren't as trustworthy. This can happen today with Facebook. It just isn't talked about much. Writing an app for FB is eye opening.
Ultimately, a larger subset of your data will eventually become public. This will happen by users installing games and other apps on top of the system that aren't as trustworthy. This can happen today with Facebook. It just isn't talked about much. Writing an app for FB is eye opening.