A Blockchain Consensus Mechanism for Marine Data Management System

As the underlying technology of Bitcoin, blockchain has become increasingly mature in financial, medical, logistics and other commercial fields, and has great application potential in the marine field. Its “decentralized” feature can maintain data security and reliability through decentralized methods. Marine data management system is one of the specific application scenarios that blockchain technology is used to protect marine network data information. The consensus algorithm and decentralized idea possessed by the blockchain technology can effectively guarantee the information collaboration of the marine network, and help to improve the collaboration efficiency among multiple parties involved in the safe sharing of marine data. In this paper, according to the analysis of the construction demands of the marine data management system, based on the blockchain technology, a distributed cross-chain transaction, called the global blockchain, is structured, which integrates the marine data collaborative heterogeneous blockchain network. On this basis, aimed at the problems of the existing PBFT consensus algorithm, such as poor dynamic addition and deletion of nodes, and large communication overhead, etc., a global consensus algorithm adapted to the marine data global blockchain network is designed for optimization of the checkpoint mechanism and view change mechanism as well as reduction of the amount of transmitted information in these two processes of the system. The simulation results show that the algorithm can effectively guarantee the consensus efficiency and the trustworthiness of the proxy nodes, realize the efficient sharing of marine data, and support the design and implementation of the blockchain-based marine data management system.