Split the key to your wallet across the people you trust. Any threshold recovers it. No single person can act alone. We never see the secret.
A seed phrase in a drawer is a single point of failure that fails silently. Nobody tells you the envelope is missing until the day you need it. By then, the coins are unreachable, and the family has nothing to do but accept the loss.
Handing someone a seed phrase means giving them full access right now, and hoping nothing changes over a lifetime. People are human. Marriages strain. Friendships fade. Twenty years is a long time to keep one envelope sealed.
Every custodial company asks you to trust them to exist, stay solvent, and stay honest for longer than most companies survive. Their failure is your loss. Their breach is your breach.
Your seed phrase is encrypted with AES-256-GCM on your device. The ciphertext alone is useless.
The encryption key is divided into N shares using Shamir's Secret Sharing. Below the threshold, a share reveals nothing.
Each person or place gets one card and a protocol folder. When K come together, the key reconstructs.
The key is split, not the trust. Any three of five can recover. No single person can act alone.
The cipher that protects classified material at the highest civilian level. GCM mode detects any tampering on recovery. The output is meaningless without the key.
Each share is a point on a polynomial. K points reconstruct it. Fewer than K reveal zero information. Provable, not promised. Below the threshold, a share is as good as random noise.
A breach cannot expose what is not stored. The secret never reaches our servers.
A court order cannot seize what is not held. We have nothing to hand over.
Recovery works offline, from the tool inside your archive. If we vanish, your cards still work.
Spouse
Adult child
Lawyer
Safe deposit box
Executor
One page. A safe word, a pause word, five rules for acting under pressure, and the stop signals to watch for. Designed to be carried, not studied.
What to do when the protocol is tested, and the urgency itself is the warning sign. Ten pages on the situations that look like emergencies and are designed to.
A written contract between you and each holder, recording what they accepted. So no one has to interpret it later from memory or from grief.
Try the real cryptography on a test secret. No signup. When you are ready, the plans are one click away.