HotStuff Blockchain Consensus Algorithm Based On Multisignature

Blockchain technology is a distributed storage technology,similar to a distributed ledger,maintained by multiple participants to establish trust in a central-less network.Blockchain adopts computer technologies such as distributed storage,consensus mechanism,peer-to-peer transmission and encryption algorithms to ensure the security of data transmission and access,and realize the characteristics of open and transparent data information,traceability and difficulty in tampering.Consensus algorithm plays a decisive role in the efficiency,security and stability of the blockchain system,and is the most critical part of the blockchain system.To put it simply,the consensus algorithm is in fact that each node of the whole network is in accordance with a specific rule to confirm the data of each node.In the process of actual cut agree,block chain system needs through a Leader election mechanism selected most Leader leadership which node,the node for consensus in the process of the main tasks,responsible for the entire network broadcast messages,while allowing the Byzantine fault tolerance agreed,guarantee under the condition of entire network node is responsible for the information from trading of data pool to retrieve data,packaging,data information and building blocks,and then to the block chain.In this paper,the working principle of Hotstuff consensus algorithm is briefly described,and the advantages and disadvantages of Hotstuff and the existing variants are summarized.Aiming at the problems existing in Hotstuff consensus algorithm research,a Leader election mechanism based on Zoo Keeper Fast Leader election algorithm is introduced.In the voting signature stage of the replica node,the MUSIG signature scheme based on Schnorr multiple signatures is used to generate indistinguishable signatures,which are the same as the Schnorr signature signed by ordinary single signer,and can avoid the malicious signer secretly planning to steal the key with other signers.In addition,MUSIG signatures can restore key aggregation properties without loss of security,thus speeding up node message validation.Finally,through experimental analysis and comparison,the feasibility of MUSIG＿HOTSTUFF algorithm is analyzed and studied.Compared with Hotstuff consensus algorithm in performance,MUSIG＿HOTSTUFF consensus algorithm has higher security and improved consensus efficiency.