基于混合共识的区块链冷链药品追溯系统

Blockchain Cold Chain Drug Traceability System Based on Hybrid Consensus

冷链药品追溯对于保障冷链药品质量有着重要意义,但是在冷链药品追溯中依然存在质量数据"断链"等问题,文章针对这些问题,提出基于混合共识的区块链冷链药品追溯系统.此系统基于现有的共识机制,改进并提出了基于信誉值的区块链混合共识机制(DPOR+PBFT).此共识机制动态评估节点的信誉值,节点信誉值作为节点的投票权重,来选举得到验证者集合,实现节点信誉值和企业追溯业务的结合.混合共识机制通过验证者集合的快速选取和区块一致性的快速达成,可以有效提高系统吞吐量.

Traceability of cold chain drugs is of great significance for ensuring the quality of cold chain drugs. However, in the traceability of cold chain drugs, there are still problems such as the"broken chain"of quality data. In response to these problems, this paper proposes a blockchain cold chain drug traceability system based on hybrid consensus. Based on the existing consensus mechanism, this system improves and proposes a hybrid consensus mechanism for the cold chain traceability industry:blockchain hybrid consensus mechanism based on reputation value( DPOR +PBFT). This consensus mechanism dynamically evaluates the reputation value of the node. The node reputation value is used as the voting weight of the node to elect the validators set. Through these methods, the combination of the node reputation value and the enterprise traceability service is realized. The hybrid consensus mechanism can effectively improve system throughput by quickly selecting the certifier set and quickly achieving block consistency.