https://blockstack.org/blog/blockstack-whitepaper-part-1

At Blockstack, we’ve been (quietly) building a new decentralized internet that has been battle tested in production for over three years now. The Blockstack architecture removes the insecure, trusted third parties that stand between users, apps and their data. This new internet allows for true decentralization, fulfilling the original vision of Sir Tim Berners-Lee and Vint Cerf.