Bitcoin Nonce Exhaustion and the Extra Nonce Fix
A modern ASIC sweeps 4 billion nonces in under a millisecond. The extra nonce mechanism expands the search space, here is how the architecture actually works.
№ 050BitcoinBitcoin Covenant Opcodes: Trust Assumptions Compared
OP_CTV, OP_VAULT, and CSFS enforce spending rules differently. Their trust assumptions diverge sharply, and that gap determines your real attack surface.
№ 051BitcoinBitcoin's Quadratic Hashing Bug: SegWit's Fix Explained
Bitcoin's sighash algorithm scaled as N² with input count, creating a live attack vector. The mechanics, the 2015 megatransaction, and how BIP143 closed it.
№ 052MiningStratum V2 Header-Only Mining Cuts Pool Censorship
Stratum V2's Job Negotiation mode lets miners build their own block templates, removing the pool's ability to censor transactions. The tradeoffs explained.
№ 053BitcoinBitcoin's Quadratic Sighash Bug, Explained
Before SegWit, a single crafted transaction could stall nodes for minutes. The mechanism, the real attack surface, and what BIP143 actually changed.
№ 054MiningStratum V2 Job Negotiation: Miners Reclaim Block Templates
Stratum V2 lets miners build their own block templates, stripping pool operators of the power to quietly drop specific transactions. The mechanics, examined.
№ 055BitcoinBitcoin Hashrate Escrow and Merged-Mined Sidechains
Hashrate escrow lets Bitcoin miners secure sidechains without a second consensus system, the exact mechanism, BIP 300 numbers, and honest caveats included.
№ 056MiningStratum V2: Bitcoin Miners Reclaim Block Template Control
Stratum V2 separates transaction selection from hashrate contribution, giving individual miners editorial control over what their machines actually confirm.
№ 057BitcoinBitcoin's Taproot Annex: Reserved Space Explained
The Taproot annex is a reserved byte field in Bitcoin transactions, committed at signing, consensus-valid today, and blank until a future soft fork fills it.
№ 058BitcoinBitcoin Miniscript: Complex Spending Conditions Explained
Miniscript compiles human-readable Bitcoin spending policies into verifiable, non-malleable Script, concrete mechanism and a worked treasury example inside.
№ 059BitcoinSIGHASH_ANYPREVOUT and Eltoo Payment Channels
APO lets eltoo overwrite old channel states without penalty transactions or revocation archives. A concrete look at the mechanism and what blocks deployment.
№ 060BitcoinBitcoin's Dandelion Protocol and Transaction Origin Privacy
Dandelion splits Bitcoin propagation into stem and flood phases to defeat IP-to-transaction correlation. Mechanics, real tradeoffs, and deployment status.