https://youtu.be/Z8SOA27TDcM Not only #blockchains. #Blockchain is global decentralized ledger with consensus. All this make them slow. It is wide range of areas where we need something super fast and for much more local networks . we have a concepts like #nanoledger - llist on steroids that use cryptographical digest of the block for data #integrity. #Microledger is append only ilog but with proof of #authentisity . So we add controller identifiers that allow to get a public key and signature.