Abstract
In this article we present Iwazaru - a dedicated Byzantine fault-tolerant distributed sequencer that significantly outperforms similar solutions previously used for that purpose. The proposed protocol is designed for timed asynchronous systems, i.e. environments in which the response time is bounded by a known value. Using this assumption we were able to reduce the total number of required communication rounds by one. Additionally, although Iwazaru itself still requires 3f + 1 replicas to tolerate f malicious parties, once the ordering is established no more than 2f + 1 machines are required to execute the requests. The performance evaluation shows that in gracious executions Iwazaru can perform around 30% faster than Castro and Liskov’s PBFT, which was previously used as an algorithm of choice for request ordering.
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Zbierski, M. (2013). Iwazaru: The Byzantine Sequencer. In: Kubátová, H., Hochberger, C., Daněk, M., Sick, B. (eds) Architecture of Computing Systems – ARCS 2013. ARCS 2013. Lecture Notes in Computer Science, vol 7767. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-36424-2_4
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DOI: https://doi.org/10.1007/978-3-642-36424-2_4
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