Rich Sharing for the Web [abstract of pdf paper]

Some of these ideas appear to be present in HP Trust Circles, <a href="http://www.cryptomill.com/discover2014/HPTC%20Product%20Brief.pdf" rel="nofollow">http:&#x2F;&#x2F;www.cryptomill.com&#x2F;discover2014&#x2F;HPTC%20Product%20Brie...</a>