关键词: 供应链, 区块链, 数据共享模型, 共识算法, 实用拜占庭容错算法

Abstract: The centralized data storage mode adopted by the traditional supply chain management system has some problems, such as single point of failure, data privacy disclosure, the opaque internal operation of the system and so on, which seriously restricts the information flow and data sharing among enterprises. Blockchain is distributed, open, transparent and tamperproof. It can provide reliable underlying services for the implementation of distributed data security sharing system. Therefore, this paper proposes a blockchainbased supply chain quality data security sharing model, which takes the distributed blockchain network as the core to build decentralized data security sharing services. At the same time, the practical Byzantine faulttolerant (PBFT) algorithm used in blockchain has some problems, such as large consensus delay, low throughput, poor performance, and does not support node dynamic management. Combined with the characteristics of the supply chain alliance chain, by introducing a simplified consistency protocol and a new node management mechanism, the communication complexity of the algorithm is reduced and the dynamic management of nodes is realized.Key wordssupply chain; blockchain; data sharing model; consensus algorithm; practical Byzantine faulttolerant (PBFT) algorithm

Key words: supply chain, blockchain, data sharing model, consensus algorithm, practical Byzantine faulttolerant (PBFT) algorithm