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  1. Home
  2. /Glossary
  3. /Byzantine Fault Tolerance (BFT)
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blockchain

Byzantine Fault Tolerance (BFT)

A system's ability to keep functioning correctly even when some participants are acting maliciously or failing.

Definition

A system's ability to keep functioning correctly even when some participants are acting maliciously or failing. The name comes from a classic computer science problem about unreliable generals coordinating an attack. Most blockchain consensus mechanisms are designed to be BFT, typically tolerating up to one-third of nodes being dishonest.

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Related Terms

Consensus Mechanism

The method a blockchain uses to agree on which transactions are valid and in what order.

Validator

A node operator who validates transactions and creates blocks on a proof-of-stake network.

Decentralized

Not controlled by any single entity, authority, or server.

ABI

Application Binary Interface.

Account Abstraction

A way to make crypto wallets behave more like normal apps by turning every account into a smart contract.

Account Model

The way Ethereum and many other chains track balances.

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