The Bitcoin security newsletter from Bitcoin Security MasteryTM. We cut through the noise to deliver the signal — actionable security intelligence for anyone holding Bitcoin in self-custody.
One critical Bitcoin security topic, explained clearly with practical guidance.
Three bite-sized updates on firmware releases, emerging threats, and tools.
A real security incident dissected — what happened and the lesson for you.
A single, concrete action step to meaningfully improve your security.
All Issues
From Mt. Gox to FTX to DMM Bitcoin — the pattern is always the same. Your exchange account is an IOU, not a wallet. Here’s why self-custody is the only real ownership.
Read issue →We reconstructed a real phishing email targeting Bitcoin holders and annotated every red flag. Learn the hook, the lure, and the trap — plus five rules that make you immune.
Read issue →Paper degrades. Memory fails. And your phone camera might be watching. A deep dive into steel backups, camera isolation, geographic distribution, and the real-world practices that protect serious holdings.
Read issue →If you don’t verify your own transactions, you’re trusting someone else to tell you the truth about your money. Learn why running a Bitcoin node is the most underrated security decision you can make.
Read issue →All the encryption in the world won’t help if someone can threaten you physically. How information leakage creates physical risk, and the six defences that actually work — plus why OpSec thinking protects your entire life.
Read issue →Not all hardware wallets are created equal. A head-to-head comparison of Trezor, Ledger, Coldcard, BitBox02, and SeedSigner on security architecture, open-source status, supply chain integrity, and track record.
Coming soonBitcoin isn’t anonymous — it’s pseudonymous. Learn how chain analysis companies map your transactions to your identity, and practical steps to protect your financial privacy.
Coming soonBitcoin’s monetary policy isn’t just economics — it’s a security story. Why scarcity raises the stakes on every coin you hold, the generational security challenge, and planning for decades.
Coming soonBybit lost $1.5 billion from what they called “cold storage” — the largest crypto theft in history. How North Korea’s Lazarus Group pulled it off, why multisig didn’t help, and what it means for anyone still trusting an exchange.
Coming soonEveryone says “use a VPN.” But a VPN doesn’t make you anonymous — it moves your trust from your ISP to a VPN provider. Learn when a VPN helps, when Tor is the real answer, and which providers actually accept Bitcoin without logging your activity.
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