Byzantine Fault Tolerance (BFT)

A preventive counteraction against malicious attacks and software errors

Wallex Trust & Custody

How in the world of decentralized digitization everything function accordingly within an ecosystem without an authority? What if a node intended to misbehave or just fell asleep and failed to act on an important message?

Of Nodes, Peers, and Consensus

The Byzantine Fault Tolerant (BFT)

-They can only agree together to attack or retreat by sending their messages through couriers between them.

-A general’s decision is final.

-All generals must agree to a common decision and execute in synchronicity.

But it is highly probable that some generals or couriers may be traitors who are capable of altering messages or sending malicious responses to sabotage the cause. Messages may also be destroyed or lost along the way. The good-intentioned generals must find ways and means to reach out to one another to achieve a consensus to overcome the odds of miscommunication and execute the plan in coordination. If not, the plan can end in failure.

The Blockchain Dilemma

The Byzantine Fault Tolerance is a fundamental property of a blockchain architecture that can protect its functions even if there is an uprising of not more than one-third of malicious nodes. Proof-of-Work and Proof-of-Stake are examples of such consensus protocols.

The Genius of Satoshi Nakamoto

Conclusion

Aside from PoW and PoS, which are by far the more famous, other consensus protocol mechanisms are on the rise like Practical Byzantine Fault Tolerant (PBFT), Delegated Proof of Stake (DPoS), Directed Acyclic Graphs (DAG), Proof of Elapsed Time (PoET).

Beyond blockchain, BFTs are also used in other sensitive industries such as in nuclear power, space, and aviation. Where security and safety play a major role, large networks of interconnecting sensors and computers acting as nodes must be as reliable as possible at all times so that they function at high levels even in the presence of faulty nodes.

Looking into the future, researchers and developers will keep on doing what they do best to perfect such BFT systems as digital organizations of emerging classes need to be safe and secure amid recurring Byzantine faults and issues.

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Credit: The Capital

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