Definition ∞ Byzantine Fault Tolerance is a property of a distributed system that allows it to continue operating correctly even when some of its components fail or act maliciously. In blockchain contexts, it ensures that the network can reach agreement on the state of the ledger despite the presence of nodes that may exhibit unpredictable or adversarial behavior. This capability is fundamental to the security and reliability of decentralized ledgers.
Context ∞ Debates concerning Byzantine Fault Tolerance often arise when discussing the security models of various blockchain protocols, particularly in relation to their resistance against Sybil attacks or coordinated malicious actions by network participants. Its implementation and robustness are critical considerations for assessing the trustworthiness of a given distributed ledger technology.
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