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The Istanbul BFT Consensus Algorithm

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arxiv 2002.03613 v2 pith:DMPELZPH submitted 2020-02-10 cs.DC

classification cs.DC
keywords algorithmcommunicationibftconsensusperiodsachievesassumesassumptions
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abstract

This paper presents IBFT, a simple and elegant Byzantine fault-tolerant consensus algorithm that is used to implement state machine replication in the \emph{Quorum} blockchain. IBFT assumes a partially synchronous communication model, where safety does not depend on any timing assumptions and only liveness depends on periods of synchrony. The algorithm is deterministic, leader-based, and optimally resilient - tolerating $f$ faulty processes out of $n$, where $n \geq 3f+1$. During periods of good communication, IBFT achieves termination in three message delays and has $O(n^2)$ total communication complexity.

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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. Toward Practical Decentralized Proof-of-Location via Physical Witnessing Zones

    cs.CR 2026-08 conditional novelty 6.0 of 10

    A four-witness UWB prototype with a BFT ledger produced location proofs at 0.18 m mean error in one indoor room and rejected simulated out-of-zone, stale-reference, and range-inflation attacks.

  2. Decentralization in PoS Blockchain Consensus: Quantification and Advancement

    cs.DC 2025-04 conditional novelty 4.0 of 10

    Square-root and logarithmic stake-weighting functions raise decentralization metrics by about 51% and 132% respectively across ten PoS blockchains, but the claims depend on an unresolved Sybil-cost assumption.

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