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About Blockchain Consensus: From Proof of Work to Gasper

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How open networks of mutually distrusting machines agree on a single transaction history. You will be able to explain why Proof of Work plus the longest-chain rule solves permissionless consensus, quantify why its finality is only probabilistic, analyze the economics of a 51% attack, and trace how Proof of Stake systems like Ethereum's Gasper bolt a BFT finality gadget (Casper FFG) onto a fork-choice rule (LMD-GHOST) with slashing as the enforcement mechanism. You will finish able to evaluate the tradeoffs among Nakamoto, delegated, and nominated designs.

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What You'll Learn

Concepts:
Nominated Proof of Stake Gasper Longest-Chain Rule Finality Gadget Distributed Consensus Nakamoto Consensus Difficulty Adjustment 51% Attack Casper FFG Slashing LMD-GHOST Probabilistic Finality Blockchain Trilemma Proof of Work Delegated Proof of Stake Proof of Stake

What you will learn

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