Definition ∞ The Dolev-Reischuk Lower Bound is a fundamental theoretical result in distributed computing that establishes the minimum number of communication rounds required to achieve Byzantine agreement among processes. It specifies that in a network with ‘f’ faulty nodes, at least ‘f+1’ rounds of message exchange are necessary for all non-faulty nodes to reach consensus. This bound provides a benchmark for the efficiency and latency of Byzantine Fault Tolerant protocols. It highlights inherent limitations in achieving agreement under adversarial conditions.
Context ∞ The discussion around the Dolev-Reischuk Lower Bound is central to the design and analysis of blockchain consensus mechanisms, particularly those aiming for high throughput and low latency. A key debate involves practical implementations that attempt to approach this theoretical limit while maintaining security and decentralization. Future developments often focus on optimizing communication strategies and cryptographic techniques within proof-of-stake and other BFT-inspired protocols to achieve faster finality.
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