A Simple and Efficient Asynchronous Randomized Binary Byzantine Consensus Algorithm

Tyler Crain

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arXiv · 2002.04393

A Simple and Efficient Asynchronous Randomized Binary Byzantine Consensus Algorithm

Tyler Crain

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Abstract

This paper describes a simple and efficient asynchronous Binary Byzantine faulty tolerant consensus algorithm. In the algorithm, non-faulty nodes perform an initial broadcast followed by a executing a series of rounds each consisting of a single message broadcast plus the computation of a global random coin using threshold signatures. Each message is accompanied by a cryptographic proof of its validity. Up to one third of the nodes can be faulty and termination is expected in a constant number of rounds. An optimization is described allowing the round message plus the coin message to be combined, reducing rounds to a single message delay. Geodistributed experiments are run on replicates in ten data center regions showing average latencies as low as 400 milliseconds.

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Tyler Crain. 2020-02-09. A Simple and Efficient Asynchronous Randomized Binary Byzantine Consensus Algorithm. https://arxiv.org/abs/2002.04393

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