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Vivisecting the Dissection: On the Role of Trusted Components in BFT Protocols

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arxiv 2312.05714 v1 pith:C4D5PDKN submitted 2023-12-10 cs.DC cs.CR

Alysson Bessani , Miguel Correia , Tobias Distler , Rüdiger Kapitza , Paulo Esteves-Verissimo , Jiangshan Yu This is my paper · ORCID
classification cs.DCcs.CR
keywords protocolsfault-tolerantreplicastrustedadvocateargumentsbyzantinechallenged
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

A recent paper by Gupta et al. (EuroSys'23) challenged the usefulness of trusted component (TC) based Byzantine fault-tolerant (BFT) protocols to lower the replica group size from $3f+1$ to $2f+1$, identifying three limitations of such protocols and proposing that TCs should be used instead to improve the performance of BFT protocols. Here, we point out flaws in both arguments and advocate that the most worthwhile use of TCs in BFT protocols is indeed to make them as resilient as crash fault-tolerant (CFT) protocols, which can tolerate up to $f$ faulty replicas using $2f+1$ replicas.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Hard Shell, Reliable Core: Improving Resilience in Replicated Systems with Selective Hybridization

    cs.DC 2025-08 conditional novelty 6.0 of 10

    ShellFT enables selective Byzantine fault tolerance at the granularity of individual protocol micro-replicas, reducing diversification costs to 29-46% of baseline compared with full hybrid approaches.

  2. Not eXactly Byzantine: Efficient and Resilient TEE-Based State Machine Replication

    cs.DC 2025-01 conditional novelty 6.0 of 10

    NxBFT is a TEE-based, asynchronous, leaderless DAG consensus protocol that achieves the highest throughput in the authors' comparison against MinBFT and Chained-Damysus for up to 40 replicas, at the cost of higher lat...

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