一种基于信用的改进PBFT高效共识机制

基于联盟链的特点和要求，分析共识机制的协议性能和资源的使用，在实用拜占庭容错技术（practical byzantine fault tolerance，PBFT）的基础上，对共识过程中的协议进行了针对性的改进。新共识机制中，首先引入了信用评价，配合简化的一致性协议促进系统进入良性循环；修改检查点协议，使节点能动态地加入、离开系统，提高系统灵活性。实验结果表明，新的共识机制能在长期运行中缩短交易确认时间、减少通信资源的使用、提高系统的效率。

Improved PBFT efficient consensus mechanism based on credit

Based on the characteristics and requirements of the consortium blockchain, this paper analyzed the protocol performance of the consensus mechanism and the use of resources. Based on PBFT(practical byzantine fault tolerance), this paper targeted the agreement in the consensus process for improvement. In the new consensus mechanism, it first introduced the credit evaluation, and used the simplified coherence protocol to promote the system to enter into a virtuous circle. It modified the checkpoint protocol that the nodes could dynamically join and leaved the system and improved the system flexibility. The experimental results show that the new consensus mechanism can shorten transaction confirmation time, reduce the use of communication resources, and improve system efficiency in the long running.