TSW-BFT--A BFT Protocol Based on Trusted Switches for Hybrid Scenarios

Control computer systems in critical security domains such as aerospace require extremely high real-time performance and reliability. While existing Byzantine fault tolerance consensus protocols provide fault-tolerant mechanisms, they face challenges in hybrid application scenarios such as high communication complexity, complex endpoint replicas, and expensive trusted hardware deployment costs. We proposes TSW-BFT, a consensus protocol based on trusted switches. By introducing trusted switch components at the data path layer combined with threshold cryptography, it reduces the total number of replicas required to tolerate f Byzantine replicas to 2f+1. The proposed algorithm provides general consensus services for numerous regular replicas using limited trusted hardware, and implements high-safety modes and membership management mechanisms to support dynamic mode switching in hybrid scenarios. Results indicate that the TSW-BFT algorithm reduces consensus latency by 23% compared to PBFT and by 42.3% compared to MinBFT.