Show HN: Secret Key – Shamir-based emergency access to a password vault

Category: security

Tags: shamir-secret-sharing, password-vault, digital-inheritance, php, self-hosted, 2fa

Score: 5.5/10 (Innovation: 5, Technical: 5, Documentation: 7, Utility: 5)

Secret Key is a self-hosted PHP application that uses Shamir's Secret Sharing to split a password vault's master password among trusted contacts for emergency access after death. It combines SMS-based 2FA with a quorum threshold, ensuring no single person can access the vault alone. The project is notable for addressing digital inheritance in a zero-database, fully offline-friendly way.

Target audience: individuals concerned with digital legacy, security-conscious users, self-hosters

Repository: https://github.com/mateuszkarpierz/secret-key · HTML · MIT · 3 stars

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