Byzantinische Fehlertoleranz (BFT)
The property of a distributed system to reach consensus and operate correctly even when algunos nodes act maliciously or fail arbitrarily.
Byzantine Fault Tolerance (BFT) is the capacity of a network to withstand 'Byzantine faults'—a class of failures where components may not only stop working but also provide conflicting or false information. In a BFT system, consensus is maintained as long as the number of faulty nodes does not exceed a certain threshold, typically defined as (n-1)/3. Unlike simple crash-fault tolerance, BFT assumes that nodes can be adversarial and intentionally attempt to subvert the network.
graph LR
Center["Byzantinische Fehlertoleranz (BFT)"]:::main
Pre_distributed_systems["distributed-systems"]:::pre --> Center
click Pre_distributed_systems "/terms/distributed-systems"
Pre_consensus_mechanism["consensus-mechanism"]:::pre --> Center
click Pre_consensus_mechanism "/terms/consensus-mechanism"
Rel_byzantine_generals_problem["byzantine-generals-problem"]:::related -.-> Center
click Rel_byzantine_generals_problem "/terms/byzantine-generals-problem"
Rel_sybil_attack["sybil-attack"]:::related -.-> Center
click Rel_sybil_attack "/terms/sybil-attack"
Rel_consensus_mechanism["consensus-mechanism"]:::related -.-> Center
click Rel_consensus_mechanism "/terms/consensus-mechanism"
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🧒 Erkläre es wie einem 5-Jährigen
🛡️ BFT sorgt dafür, dass ein Netzwerk bei der Wahrheit bleibt, auch wenn einige Teilnehmer versuchen zu betrügen.
🤓 Expert Deep Dive
BFT-Protokolle lösen das Problem des 'Byzantinischen Generals'. In asynchronen Netzwerken ist das Limit bei 1/3 der Knoten. Moderne Blockchains wie Cosmos nutzen Tendermint BFT, um sofortige Finalität zu erreichen.