BIP39 Books

Book ciphers for BIP39 seed backup. Veit the Fox (children's book) + 777 Wisdoms. Add a layer, don't replace your metal. #Bitcoin #OpSec

Public Key

npub1f545lryqeq4s6784dsycg8xqucue29fv9sxt99tzu47kdwuuq8psvu3w8q

NIP-05 Address

[email protected]

Profile Code

nprofile1qqsy62603jqvs2cd0r6kczvyrnqwvwv4z5kzcr9jj43w2ltxhwwqrscprpmhxue69uhhyetvv9ujuumwdae8gtnnda3kjctvqy28wumn8ghj7un9d3shjtnyv9kh2uewd9hs0e9scf

Publishing to

relay.snort.social

relay.damus.io

nos.lol

Author Public Key

npub1f545lryqeq4s6784dsycg8xqucue29fv9sxt99tzu47kdwuuq8psvu3w8q

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Last Notes

2026-05-28 15:00:06 GMT

Inside "777 Wisdoms for Every Day":
777 short wisdoms, numbered 1 through 777.
Every single one of the 2048 BIP39 words appears naturally across the pages — you'd never know unless you were looking.
A book that reads like a gift, works like a backup tool.

2026-05-22 12:00:06 GMT

If you disappeared tomorrow, could your family access your Bitcoin?
Most seed backups are written for "me, tomorrow". Almost none are written for "them, without me".
Inheritance is the silent failure mode of self-custody.

2026-05-19 12:00:07 GMT

Three ways a seed backup fails:
Fire: metal survives. Paper and screens don't.
Flood: laminated paper survives. Ink on raw paper doesn't.
Theft: nothing survives unless the attacker can't recognize it as a backup.
Pick a form that beats all three.

2026-04-27 14:00:07 GMT

The $5 wrench attack: someone threatens you until you hand over your keys.
No cryptography stops this — you're at the wrong end of the wrench.
Plausible deniability rewrites the problem: what the attacker can't identify, they can't extract.

2026-04-22 14:00:07 GMT

We publish two BIP39 books. Not translations of each other, not updates — two entirely different books for two kinds of Bitcoiners.
Veit the Fox: a children's story. If kids are around, this is the book on your shelf.
777 Wisdoms: a quote collection. For everyone else.

2026-04-20 14:00:00 GMT

"But what if you lose the book?"
Buy two copies. Keep one at home, one with someone you trust.
The book alone is useless — just a book.
Your codes alone are useless — just numbers.
Only the combination reveals your seed.
A second copy is a backup, not a vulnerability.

2026-04-17 12:00:00 GMT

Your @COLDCARDwallet seed is safe at home.
But what about a second copy at a friend's place?
24 seed words on paper = full access for anyone.
Book Cipher codes on paper = just numbers, worthless without your book.
Same backup. Zero trust required.

2026-04-16 12:00:00 GMT

BIP39 isn't just Bitcoin.
Ethereum, Solana, Cardano, Polkadot — over 100 wallets use the same BIP39 word list for seed phrases.
If your wallet gave you 12 or 24 English words as a backup, chances are they're from the BIP39 list.
One book. Works for all of them.

2026-04-14 12:00:00 GMT

Most Bitcoiners engrave seed words directly on metal.
Anyone who finds it knows exactly what it is.
What if you engraved this instead?
47-3-5, 112-7-2, 8-11-1...
Same fire & water protection. But now nobody knows what they're looking at.
Book Cipher + Metal.

2026-04-11 12:00:00 GMT

Traveling with Bitcoin means your seed phrase travels too.
Metal plate in luggage? Obvious at any border.
A wisdom book in your bag? Just a book.
Numbers on a slip of paper? Could be anything.
Book Cipher splits your backup into two innocent pieces — wherever you go.

2026-04-09 12:00:00 GMT

The Book Cipher has been used for centuries — by spies, military, and anyone who needed to hide a message in plain sight.
Now it's being used to protect Bitcoin seed phrases.
Had you heard of the Book Cipher before Bitcoin?

2026-04-07 12:00:00 GMT

Most people know the 24-word seed phrase. Fewer know about the 25th word.
It's called a passphrase — an extra word YOU choose, added to your 24 words.
Same 24 words + different passphrase = completely different wallet.
One of the most powerful features in Bitcoin security.

2026-04-05 12:00:00 GMT

What looks like a book of daily inspiration — but contains all 2048 BIP39 words?
777 Wisdoms for Every Day. 777 numbered wisdoms. Use the classic Book Cipher to encode your seed phrase as simple number references.
Your backup hides in plain sight. Now on Amazon.

2026-04-04 12:00:00 GMT

Back up your seed phrase with a BIP39 Book:
1. Get your 24 seed words from your hardware wallet
2. Open the book, find each word
3. Note the position: page — line — word number
4. Store the number list separately from the book
Done. Your backup is two innocent-looking pieces.

2026-04-02 12:00:00 GMT

"Not your keys, not your coins."
FTX. Celsius. Mt. Gox. BlockFi.
Every exchange collapse proves the same lesson: if someone else holds your keys, they hold your Bitcoin.
Self-custody is the only way to truly own your coins. But it means one job: protecting your seed phrase.

2026-03-31 12:00:00 GMT

Meet Veit the Fox — a children's book with a secret superpower.
A real story you read to your kids. But hidden inside are all 2048 BIP39 words.
Use it as a Book Cipher to back up your Bitcoin seed phrase — while it sits on your shelf looking like any other bedtime story.

2026-03-28 12:00:00 GMT

Bitcoin OPSEC rule #1: Don't let anyone know how much you hold.
Rule #2: Don't let anyone find your backup.
A Book Cipher splits your backup in two:
- A book on your shelf (looks normal)
- A number list (meaningless without the book)
Two locations. No digital attack surface.

2026-03-27 12:00:00 GMT

Metal seed plates are popular. But engraving your 24 seed words on metal has a problem:
Anyone who finds it knows exactly what it is.
A Book Cipher changes this. Instead of words, you store numbers — page, line, word positions. On paper or on metal.

2026-03-25 12:00:00 GMT

The Book Cipher is a centuries-old encryption method — and it's perfect for seed phrase backup.
How it works:
1. Pick a book
2. Find each word of your seed in the book
3. Write down the position: page-line-word
4. Store the numbers separately from the book

2026-03-23 12:00:00 GMT

Your seed phrase is the master key to your Bitcoin.
Storing it in a notes app, cloud drive, or password manager means it lives on a server somewhere — exposed to hacks, breaches, and subpoenas.
Digital backups have digital attack surfaces. Period.

2026-03-22 12:00:00 GMT

Your Bitcoin seed phrase is built from a list of exactly 2,048 English words — defined by an open standard called BIP39.
Anyone who knows these 12 or 24 words controls your Bitcoin. No password reset. No customer support. Just the words.