Bitcoin Inheritance and Digital Asset Succession

GRIFORTIS researches and builds open standards so Bitcoin and other digital assets are ready for any succession event: handed on in life, or left to the people you love.

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What We Stand For

Open by Default

Our protocols are open source and free, forever. Trust in an inheritance plan should come from scrutiny, not secrecy.

We Never Hold Your Keys

GRIFORTIS never holds keys, seeds, or shares. Secret material stays with you and the people you choose.

Built to Outlive Its Tools

Apps disappear, vendors close, devices fail. Recovery must still work decades from now, even with pencil and paper.

Made for Whoever Comes Next

A plan is only as good as the next person's ability to follow it: under pressure, and without the person who designed it.

DuraShare

An open protocol for durable Bitcoin seed backup.

DuraShare splits a standard BIP39 recovery phrase into human-readable shares. Any chosen number of them restores the original phrase; fewer reveal nothing about it. Each share can be checked where it is kept, without gathering the others or exposing the secret. Every step, from sharing and checking to recovery, can be done with software or entirely by hand.

The specification, whitepaper, and reference implementations are open and maintained on GitHub.

View DuraShare on GitHub

People

Jeroen van de Graaf

Chief Scientist; Advisory Board

Professor, DCC–UFMG. Cryptographer (ZK, MPC, privacy, voting systems, applied protocols); PhD, Université de Montréal (1997).

Articles

Essays on self-custody, succession, and keeping digital assets recoverable over time.

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