byzantine fault tolerance

Questions

What does byzantine fault tolerance mean?

The dependability of a fault-tolerant (distributed) computer system, where components may fail without perfect information about the state of the components.

Where does byzantine fault tolerance come from?

From an essay by American computer scientist Robert Shostak, who simplified the computing problem in a hypothetical siege by the Byzantine Empire. In the siege, a group of Byzantine generals, without central command and physically separated, need to vote to determine whether all troops should besiege the fortress or withdraw. Faults are metaphorized with traitors who could vote selectively and messengers delivering the votes, who could fail to deliver votes or forge them.

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