SeedGuard

Twelve words. Or twenty-four.

They are not a password to the wallet — they are the wallet. Whoever reads them has taken the money. Whoever loses them has lost the money. No support, no recovery, nobody to call.

And there you are, holding a scrap of paper with no idea where to put it.

Hide it better? Paper burns, ink fades, flats get flooded, and boxes get thrown out unopened when you move. Make a copy? Wonderful — now it can be stolen from two places. Every fix cures one trouble and creates another, which is why “store it securely” is advice worth nothing. Securely against what?

SeedGuard is about getting off this fork in the road, not pacing around it.

The methods

There are five. About each one we are honest: what it gives you, what it costs you, and who it does not suit.

SeedShift

Your real words turn into different words. The new phrase looks perfectly ordinary — you can keep it in plain sight, on the fridge door if you like. Only a key phrase turns it back, and that phrase stays in your head, written down nowhere. A thief finds your paper, takes it, and walks away with nothing.

The twenty-fifth word

A passphrase is added to your words — and a different wallet opens. One passphrase, one wallet. Another passphrase, another wallet. If you are ever made to hand over access against your will, you hand over the one that holds a little.

Shamir's secret sharing

The phrase is cut into five parts, and any three put it back together. Two with you, one with your brother, one in a deposit box, one with a notary. Lose a part — no harm done. Have a part stolen — the thief has learned precisely nothing: a single piece holds not one of your words.

Key encryption and plain splitting

Simpler, for those who would rather understand every step. About the second we say the unpleasant part up front: each piece gives away its share of the words in plain sight. Better to know that now than later.

All of it is done with a pencil on paper. No software, no internet, no trusting somebody else's code.

Don't take our word for it — press the button

Every method comes with a working example right there on the page. One press and the whole calculation unfolds on made-up words: where each number came from, how the pieces rebuild the original phrase, why the result looks like the real thing.

Everything is computed in your browser — nothing goes anywhere.

There is no field for your own phrase. There never will be. Real words must not be typed on a machine that is connected to a network — and if they must not, there is no reason to leave the possibility open.

The example itself downloads as a single file and opens on a computer that has never seen the internet. That is where you use your own words. That is the only way to work with them.

Also on the site

• A breakdown of what you are actually defending against: theft, loss, a ruined medium, inheritance, deception. Each trouble has its own answer, and mixing them up helps nobody.
• A hardware comparison — hardware wallets and metal plates on which the words survive both fire and flood.
• On inheritance — how to make sure the people close to you get access when you are gone. And not before.
• A glossary that explains an unfamiliar word on the spot, and news of what is happening to wallet security.

Our rules

Free. Open. Nothing to install. No third-party counters, no tracking. Thirteen languages.

And the point of the whole thing: we explain not only how, but why. A method you have not understood you will either never use, or use and one day get wrong. And here you get it wrong exactly once.

seedguard.io