关键词: 云计算, 区块链, 物流区块链, 区块链模型, 共识算法

Abstract: In order to solve the increasingly urgent problems such as the non-tampering of information such as business flow, logistics, capital flow, information flow and service flow in the supply chain of logistics enterprises, the traceability of goods, the non-repudiation of non-repudiation, and the security of funds, logistics block chain model and block chain consensus algorithm based on cloud computing are proposed. Firstly, the paper analyzes the problems existing in the traditional logistics transaction process and its trading model, and puts forward the idea of using cloud computing and block chain to solve its existing problems. According to the technical characteristics of cloud computing and block chain, it gives the definition of block chain and cloud logistics block chain, and proposes a logistics block chain model based on cloud computing. Then, according to the basic principle of the practical Byzantine consensus algorithm and the cloud logistics block chain model, combined with the requirements of de-centralization and non-repudiation, the algorithm of logistics block chain consensus algorithm is designed and optimized with the original practical Byzantine consensus algorithm to optimize MinBFT algorithm. Finally, the algorithm is compared with PBFT, MinBFT, CloudPBFT and other algorithms. The experimental results show that the algorithm has the advantages of more nodes, throughput and network delay time than PBFT, MinBFT, CloudPBFT and other algorithms when the node is larger than 3f+1. Therefore, the algorithm is a reliable and effective, with a decentralized and non-repudiation of the logistics block chain consensus algorithm.

Key words: cloud computing, blockchain, logistics block chain, block chain model, consensus algorithm