Category
13 essays
Blockchain essays
Where shared ledgers earn their keep—and when they do not.
Blockchain
5 min read
Crypto Health SLIs: Key Age, Algorithm Inventory, and Rotation MTTD/MTTR
Concrete metrics and SLIs for cryptographic health in fintech systems—so key age, algorithm coverage, failed auth, and rotation drills show up beside uptime.
Blockchain
5 min read
Crypto Incident Response: Rotate Compromised Primitives in Days, Not Months
A practical playbook for when a key, certificate, or algorithm is burned: contain, dual-run, rotate, and verify—so recovery is measured in days because you drilled it.
Blockchain
5 min read
Ledger Boundaries for Fintech: What Must Be On-Chain vs Off-Chain
A trust-boundary framework for financial systems: which facts need consensus, which belong in fast off-chain stores, and how crypto-agility keeps both rotatable.
Blockchain
5 min read
Production Signing Paths and Custody Models That Survive Real Money
How to design hot, warm, and cold signing paths with approvals, custody boundaries, and rotation hooks so production keys are operable—not theatrical.
Blockchain
5 min read
Compliance as Crypto Architecture: Designing Controls Auditors and Attackers Both Respect
Treat MiCA, audit evidence, and cryptographic policy as design inputs: control objectives mapped to keys, algorithms, and rotation paths—not binders assembled after launch.
Blockchain
5 min read
Post-Quantum Crypto Migration for Financial Systems: Dual-Stack Now, Panic Never
NIST’s ML-KEM, ML-DSA, and SLH-DSA are finalized. Here is a pragmatic dual-stack migration plan for fintech: inventory, hybrid KEMs, signature dual-verify, archive re-wrap, and a path aligned with the 2035 deprecation horizon.
Blockchain
5 min read
Key Management for Fintech: Choosing Between HSM, MPC, and Hybrids
Custody and signing architecture without the vendor fog: when hardware security modules win, when multiparty computation fits, how hybrids work, and which operational controls matter more than the logo on the box.
Blockchain
5 min read
A Crypto Threat Model for Fintech: What Actually Breaks First
A practical threat-modeling frame for payments, custody, and CASP-style products: assets, adversaries, harvest-now-decrypt-later, and which cryptographic failures turn into financial loss.
Blockchain
6 min read
Crypto-Agility in 2026: Change Cryptographic Primitives Without Rebuilding the House
Crypto-agility means swapping algorithms, keys, and protocols without a multi-month rewrite. Here is why financial systems need it now, what “agile” actually looks like in architecture, and how to start before a deprecation deadline forces your hand.
Blockchain
7 min read
AI + On-Chain Data: What Belongs in the Model vs the Ledger
An architecture framework for deciding what belongs on-chain, off-chain, and inside an AI model when building agents, dashboards, or analytics on top of blockchain data.
Blockchain
8 min read
Crypto Product SEO in 2026: Search, Answer Engines, and Agents
A practical SEO and AEO playbook for crypto and Web3 products: server rendering, llms.txt, quotable answer blocks, and avoiding wallet-gated content that no search or AI engine can crawl.
Blockchain
6 min read
Beyond the Hype: Where Blockchain Actually Makes Business Sense
A grounded look at which industries benefit from decentralized tech and which ones are better off without it.