VRFs and Proof-of-Stake Leader Election Explained
Why proof-of-stake protocols use verifiable random functions to pick block proposers, how the math works, and what breaks without them.
№ 026EthereumEthereum's Sync Committee: Light Client Verification
512 validators, BLS aggregation, and rotating handoffs let Ethereum light clients verify the chain head themselves, no full node, no trusted server required.
№ 027AnalysisFinality Reversion vs. Reorganization in Proof-of-Stake
A finality reversion breaks a cryptographic guarantee; a reorg is a race condition. The difference determines whether settlement is statistical or binding.
№ 028EthereumEthereum Weak Subjectivity Checkpoints Explained
Long-range attacks can rewrite proof-of-stake history silently. This is the precise mechanism Ethereum uses to stop them, and what node operators must verify.
№ 029AnalysisHow Does Blockchain Work? A Plain-English Walkthrough
Forget the jargon. Here's a clear, honest explanation of how a blockchain actually keeps records straight across thousands of computers that have never met.
№ 030AnalysisEconomic vs Cryptographic Finality in Consensus
Two blockchains can both call a transaction 'final' and mean completely different things. Here's what actually separates the two guarantees.
№ 031EthereumHow Proof-of-Stake Validators Are Selected for Blocks
Proof-of-stake block proposer selection isn't random luck. Here's the precise mechanism that keeps it fair and resistant to centralization.
№ 032EthereumEthereum Proof-of-Stake Finality Explained
Ethereum's PoS finality isn't instant. Here's the exact two-epoch mechanic that determines when a block is truly safe to treat as settled.
№ 033SecuritySybil Attacks on Nakamoto Consensus: The Real Cost
Why flooding a proof-of-work network with fake identities doesn't work: the economic mechanics that make Sybil attacks prohibitively expensive.
№ 034EthereumWhy Ethereum Validators Miss Attestations Without Ejection
Ethereum validators can skip attestation duties and keep their stake. Here's the exact penalty math and the threshold that actually gets you removed.
№ 035DeFiHow Decentralized Oracles Reach Consensus Explained
Decentralized oracles solve the blockchain data problem without recreating centralized trust. Here's the exact mechanism, with numbers.
№ 036EthereumEthereum Uncle Blocks and Network Security Explained
Uncle blocks shaped Ethereum's proof-of-work security in ways most guides miss. Here's the concrete mechanics, the tradeoffs, and why the Merge ended them.