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How scalable is Byzantine agreement? Does solving agreement require non-faulty parties to send a quadratic number of messages in the number of potential faults? In this post, we highlight the Dolev and Reischuk lower bound from 1982 that addresses this fundamental question. Dolev and Reischuk 1982: any deterministic Broadcast protocol...| decentralizedthoughts.github.io
After we fix the communication model, synchrony, asynchrony, or partial synchrony, and a threshold adversary we still have 5 important modeling decisions about the adversary power: The type of corruption (passive, crash, omission, or Byzantine). The computational power of the adversary (unbounded, computational, or fine-grained). The adaptivity of the adversary...| decentralizedthoughts.github.io