Crypto inheritance

Self-custody that survives you — without a single point of failure.

Keep custody of your own keys, and still make sure your family can recover them. Split your seed phrase into shares across the people and places you trust, encrypted end-to-end with no usable key ever sitting on our servers — and protected against tomorrow’s computers, not just today’s.

T-of-N
Shares split across people & clouds
0
Plaintext seed phrases on our servers
0
Usable keys we can read
PQ
Post-quantum encryption, hybrid
Create your free vaultHow it works

The seed-phrase trap

Self-custody puts you in charge — and puts the whole burden on twelve or twenty-four words. Write them down once and a fire or a flood erases your savings. Make copies for safety and every copy is a way for them to leak or be stolen. Hand the phrase to one relative “just in case” and you’ve created a single person who can lose it, be coerced, or simply walk off with it. Untold fortunes have died with their owners because there was no safe way to pass on the keys. The answer isn’t a better hiding place — it’s refusing to let any single point hold your whole future.

How the protection works

Each card pairs the risk with the mechanism. The cryptography is documented in full on the security page.

Split into T-of-N shares

The risk

A seed phrase has two ways to ruin you. Lose it — fire, flood, a forgotten drawer — and the coins are gone forever. Let one copy leak, and they’re stolen. A single backup can’t fix both; protecting against loss usually means more copies, and more copies means more ways to leak.

Glassbreak supplies

Your secret is split into N shares so that any T of them reconstruct it, and fewer than T reveal nothing at all. Spread three shares across two family members and a cloud, require any two — now no single lost share loses the keys, and no single stolen share gives them up.

Spread across people and clouds

The risk

Backups in one place share one fate. A house fire, a stolen laptop, a single provider going down, or one relative falling out with the family can take the whole thing with it.

Glassbreak supplies

Shares live with the people you choose and across independent clouds with no shared point of failure. One location can burn down, one provider can go dark, and the remaining shares still meet the threshold to recover.

No usable key on the server

The risk

Plenty of “secure” backup services can technically read what you store, or hold a master key that an attacker — or a subpoena — could reach. For seed phrases, that’s the whole ballgame.

Glassbreak supplies

Everything is encrypted on your own device before it reaches us. We store ciphertext and hold zero usable keys — there is no plaintext seed phrase, and no decryption key, anywhere on our servers. We cannot read your shares, and neither can anyone who breaches us.

Post-quantum, for a long horizon

The risk

Crypto is generational money. Encryption that’s fine today may not survive the decades your keys need to — and “harvest now, decrypt later” means data captured today can be cracked once the maths catches up.

Glassbreak supplies

Your shares are protected with hybrid post-quantum encryption, combining a quantum-resistant scheme with a classical one. Built for the decades-long horizon inheritance actually needs, not just for this year.

Setting it up, end to end

Four decisions, and your keys are protected against both loss and theft.

1

Choose your threshold

Decide N and T — say 3 shares, any 2 needed. More shares survive more loss; a higher threshold resists more collusion. You set the balance.

2

Place the shares

Assign shares to trusted people and to independent clouds. Each holder only ever sees their own encrypted share, never the seed phrase itself.

3

Write the instructions

Attach plain-English steps so your heirs know what they’re holding and how to bring the shares together — without ever exposing the phrase early.

4

Set the release rule

Recovery happens only when your threshold of holders acts together, or under a time-lock you control. No lone party — including us — can reconstruct it.

No single point of failure, by design

The whole promise rests on the architecture: shares spread across independent clouds that share no failure domain, so no one outage, breach, or lost location can take your keys with it. See exactly how the distribution and resilience work.

← Back to IndividualsSecurity & encryption →Distributed topology →Resilience architecture →

Frequently asked questions

Why split a seed phrase instead of just backing it up?

A single backup forces an impossible trade-off: more copies protect against loss but multiply the chance of a leak, and fewer copies do the reverse. Splitting into T-of-N shares breaks the trade-off. Fewer than T shares reveal nothing, so a stolen or lost share is harmless, while any T of them reconstruct the phrase, so you’re protected against loss too. You get both at once.

Is this a dead-man’s switch for my crypto?

It can work like one, more safely. Rather than a single trigger that dumps your keys to one person, recovery requires a quorum of share-holders acting together, or a time-lock with a notice window you can cancel. That removes the classic dead-man’s-switch risks: a false trigger, or one compromised recipient walking off with everything.

Can Glassbreak see my seed phrase?

No. Your phrase is split and encrypted on your own device before anything reaches us. We store ciphertext shares and hold zero usable keys — there is no plaintext and no decryption key on our servers. We cannot reconstruct your phrase, and a breach of our systems cannot either.

What if one of my share-holders loses their share or dies?

That’s exactly what the threshold is for. If you set 3-of-5, you can lose two shares entirely — a death, a fallout, a lost device — and the remaining three still recover the keys. You can also re-issue shares to add or replace holders as your circumstances change.

Why does post-quantum encryption matter for inheritance?

Inheritance data may sit untouched for decades, and an attacker can capture encrypted data now to decrypt later once quantum computers mature — “harvest now, decrypt later.” Hybrid post-quantum encryption pairs a quantum-resistant scheme with a classical one, so your shares are protected against both today’s threats and tomorrow’s.

Don’t let your keys die with you

Create a free vault, split your seed phrase into shares, and place them with the people and clouds you trust. Custody stays yours — recovery stays possible.

Create your free vaultHow it works

Glassbreak does not provide legal, tax, or financial advice. A vault stores and releases the shares you place in it under the rules you set; how your crypto passes to your heirs may also depend on your will and local law. Consult a qualified professional.

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