Improved PBFT Algorithm Based on Comprehensive Evaluation Model

Blockchain technology is well known due to the advent of Bitcoin. With development recent years, blockchain has been widely used in medicine, digital currency, energy, etc. The practical Byzantine fault-tolerant (PBFT) algorithm a consensus consortium blockchains. Aiming address problems PBFT algorithm, low efficiency high communication complexity, and malicious behavior primary node leading failure, an improved based on comprehensive evaluation model (TB-PBFT) proposed. First, nodes are divided into several groups multi-formation control strategy unmanned aerial vehicle (UAV) cluster, which significantly reduces complexity. Second, combining entropy method, TOPSIS Borda count proposed, uses as index, score obtained according preferences other nodes. Finally, highest ranking selected through ensure security stability network. We analyze TB-PBFT algorithms compare them with fault tolerance algorithms. Theoretical analysis simulation results show that can improve scalability reduce complexity view switching probability. also prove success rate feasibility effectiveness verified. Hence, it be applied system effectively efficiently.