FM-39 · Seed phrase concealmentDistribution: unlimited. Copy freely.
Bitcoin Seed BookSelf-custody field manual

The five-dollar wrench

Nobody breaks the cryptography; they threaten the person. Duress, decoy wallets, time-locks, and why the goal is to have nothing you can hand over today. Read it The five-dollar wrench

The evil maid and the brother-in-law

The attacker with a key to the house and a hundred quiet chances. Why repeated access beats most hiding places, and what holds up. Read it The evil maid and the brother-in-law

Brute-forcing a seed from partial knowledge

One missing word falls in minutes on a laptop, two in hours to days. The checksum helps the attacker. Why hiding one word is not a plan. Read it Brute-forcing a seed from partial knowledge

Phishing the seed

Fake updates, support scams, replacement devices in the post, "validate your wallet" pages. The real cases, the shape they share, and the one rule that beats them. Read it Phishing the seed

Border and device searches

What an officer can look at, copy and make you unlock, with the U.S. numbers. Why a list of numbers on paper crosses better than a phone full of wallets. Read it Border and device searches

Camera, screen and clipboard leaks

Seeds leak at the moment they are written, shown or typed. Cameras, screenshots that sync, clipboards that watch, printers that remember. Read it Camera, screen and clipboard leaks