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• W4308077894 abstract "Blockchain is a Byzantine fault tolerant (BFT) system wherein decentralized nodes execute consensus protocols to drive the agreement process on new blocks added to a distributed ledger. Generally, two-round communications among <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M1><mml:mrow><mml:mn mathvariant=sans-serif>3</mml:mn> <mml:mi mathvariant=sans-serif>f</mml:mi> <mml:mo>+</mml:mo> <mml:mn mathvariant=sans-serif>1</mml:mn></mml:mrow></mml:math> nodes are required to tolerate up to <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M2><mml:mi mathvariant=sans-serif>f</mml:mi></mml:math> faults in BFT-based consensus networks. This communication pattern corresponds to the worse-case scenario of consensus achievement, even under asynchronous network conditions. Nevertheless, it is not uncommon for a network to operate under better conditions, where a consensus can be reached with a lower communication cost. Hence, with the addition of a faster optimistic path toward an agreement, the idea of dual-mode consensus has been proposed as a promising approach to enhance the performance of asynchronous BFT protocols. However, this opportunity is not completely exploited by existing dual-mode protocols as the fast path can be followed only in a nonfaulty and synchronous network. This article presents a novel dual-mode protocol consisting of fast and backup subprotocols. To create different consensus committees for fast and backup-mode operations, the network contains both active and passive nodes. A consensus can be expedited through a fast-mode operation when majority of the active nodes can communicate synchronously. Under non-ideal conditions, the backup protocol takes over the agreement process from its fast-mode counterpart without starting over the suspended round. The safety and liveness of the proposed protocol are guaranteed with lower communication costs, which balance the trade-off between protocol efficiency and availability." @default.
• W4308077894 created "2022-11-08" @default.
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• W4308077894 date "2022-11-03" @default.
• W4308077894 modified "2023-10-14" @default.
• W4308077894 title "Flexico: An efficient dual-mode consensus protocol for blockchain networks" @default.
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• W4308077894 doi "https://doi.org/10.1371/journal.pone.0277092" @default.
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