A secure and highly efficient blockchain PBFT consensus algorithm for microgrid power trading

Abstract

There are a series of challenges in microgrid transactions, and blockchain technology holds the promise of addressing these challenges. However, with the increasing number of users in microgrid transactions, existing blockchain systems may struggle to meet the growing demands for transactions. Therefore, this paper proposes an efficient and secure blockchain consensus algorithm designed to meet the demands of large-scale microgrid electricity transactions. The algorithm begins by utilizing a Spectral clustering algorithm to partition the blockchain network into different lower-level consensus set based on the transaction characteristics of nodes. Subsequently, a dual-layer consensus process is employed to enhance the efficiency of consensus. Additionally, we have designed a secure consensus set leader election strategy to promptly identify leaders with excellent performance. Finally, we have introduced an authentication method that combines zero-knowledge proofs and key sharing to further mitigate the risk of malicious nodes participating in the consensus. Theoretical analysis indicates that our proposed consensus algorithm, incorporating multiple layers of security measures, effectively withstands blockchain attacks such as denial of service. Simulation experiment results demonstrate that our algorithm outperforms similar blockchain algorithms significantly in terms of communication overhead, consensus latency, and throughput.

CE-PBFT: An Optimized PBFT Consensus Algorithm for Microgrid Power Trading

“…Distributed technologies are frequently used in microgrids [24]; the PBFT is a highly suitable blockchain consensus algorithm for microgrid transactions [25], offering several advantages, including the provision of both real-time and eventual consistency, adaptability to high-frequency small-scale transactions, high security, and resilience against Byzantine faults. These features enhance the trustworthiness and resistance to attacks of microgrid transaction systems.…”

“…Hyperledger Fabric provides hot-plugged consensus algorithm modules, and we replaced the PBFT module with the CE-PBFT algorithm [25,30]. The CE-PBFT, IMPBFT, and PBFT algorithms were deployed to Hyperledger Fabric in local physical machine servers for the simulation and evaluation of their performance.…”

“…(1) For a newly registered node, the supervisory node will first verify the legitimacy of the node and then randomly select a value in the range of (15,25) as the initial credit value of the node. The new node will then join the blockchain network as a propagation node.…”