NetTopoBFT: Network Topology-Aware Byzantine Fault Tolerance for High-Coverage Consortium Blockchains
Runyu Chen, Rangang Zhu, Lunwen Wang

TL;DR
NetTopoBFT is a new blockchain consensus algorithm that improves security and performance in large-scale consortium blockchains by considering network topology.
Contribution
It introduces a topology-aware consensus mechanism with a two-layer node evaluation model and a VRF-based leader selection.
Findings
NetTopoBFT improves consensus node quality while maintaining decentralization.
The algorithm optimizes communication overhead, security, and network coverage simultaneously.
Experiments confirm its robustness and connectivity enhancements.
Abstract
The Practical Byzantine Fault Tolerance (PBFT) algorithm, while fundamental to consortium blockchains, suffers from performance degradation and vulnerability of leader nodes in large-scale scenarios. Existing improvements often prioritize performance while lacking systematic consideration of the structural characteristics of the nodes and network coverage. In this paper, a new network topology-aware Byzantine fault-tolerant algorithm NetTopoBFT is proposed for the supply chain and other application scenarios that require strict transaction finality but moderate throughput. Firstly, it innovatively combines the weighted signed network with the consortium chain, constructs a two-layer Bayesian smoothing node evaluation model, and evaluates the nodes through the two-dimensional evaluation of ‘behavioral reputation plus structural importance’. Then, to reduce the risk of being attacked, it…
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Taxonomy
TopicsBlockchain Technology Applications and Security · Distributed systems and fault tolerance · Cloud Computing and Resource Management
