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Byzantine Fault Tolerance (BFT)

Byzantine Fault Tolerance (BFT) is a critical concept in distributed systems, ensuring their resilience against faults and malicious actors. Stemming from the Byzantine Generals’ Problem, where consensus must be reached despite potential traitorous elements, BFT addresses the challenge of faulty nodes in a network. In distributed systems like blockchains, BFT is crucial for maintaining trust and integrity.

One prominent BFT algorithm is Practical Byzantine Fault Tolerance (PBFT), which facilitates consensus through a sequence of messages exchanged between nodes. PBFT can withstand up to (n-1)/3 malicious nodes, enhancing the system’s robustness. Another notable BFT algorithm is HoneyBadgerBFT, which employs cryptographic techniques for consensus in adversarial environments.

By providing fault tolerance, BFT ensures the reliability and security of distributed systems, making it indispensable in scenarios where trust and consensus are paramount, such as decentralized ledgers and networks. These BFT algorithms play a pivotal role in shaping the resilience and dependability of modern distributed systems.