Well it may be splitting hair but there is no proof or work and the number of nodes is certainly smaller. There is also CONIKS and Google's Key Transparency.

Well it may be splitting hair but there is no proof or work and the number of nodes is certainly smaller. There is also CONIKS and Google's Key Transparency. This comes to my mind: https://medium.com/@bbc4468/centralized-vs-decentralized-vs-distributed-41d92d463868 https://medium.com/@bbc4468/centralized-vs-decentralized-vs-...