Abstract. Consensus algorithms are one of the main differentiators among blockchain technologies and understanding how blockchain consensus is reached is crucial for every developer who wants to work on a given technology. A short taxonomy of consensus algorithms used in various blockchain technologies will be given. We will start with motivations for the consensus in distributed ledger systems, then continue with the well-known proof-of-work used in Bitcoin and show you how it differs from non-Byzantine fault-tolerant consensus algorithms like Raft. We will wrap-up with emerging technologies, like Swirlds and Avalanche.

Speakers:  Ondrej Chaloupka & Vojtech Juranek, Red Hat