NKN, or New Kind of Network, is an open source protocol for public blockchain-based peer-to-peer networks for sharing network bandwidth and Internet connectivity. The project was launched in January 2018 and is consulted by Stephen Wolfram, creator of Mathematica and Wolfram | Alpha, and Whitfield Diffie, inventor of public key cryptography. NKN Mainnet was launched in July 2019 and has up to 25,000 total consensus nodes (more than Bitcoin or Ethereum). Notable use cases for NKN include: content delivery system (contract with Chinese video giant iQIYI) Edge computing (contract with China Mobile) D-chat (secure messaging application) nShell (secure remote terminal access). NKN's consensus algorithm is based on Cellular Automata, A New Kind of Science and Ising Model, in which a simple local majority rule can lead to convergence of the entire system in a small number of iterations. The goal of the project is to scale to an arbitrary number of equal consensus nodes. NKN uses a global addressing scheme based on public keys to allow direct peer-to-peer communication without centralized servers. Packet routing is based on the Chord Distributed Hash Table (DHT), which maps each NKN address to a random, verifiable location on the Chord DHT ring.