From GitHub · · 2m
Seal: Digital Legacy Envelopes for the Deceased
Seal lets you encrypt family secrets for after death without a server, using Apple's iCloud and phone-only keys
In brief
Seal lets you encrypt family secrets for after death without a server, using Apple's iCloud and phone-only keys Seal stores encrypted family secrets on your phone with no backend, opening only after you die with trusted contacts Originally reported by GitHub.
What Seal Does
Seal encrypts letters, photos, voice messages, videos, and passwords for family members after you die without a server.
How It Works
You add trusted contacts in person, create encrypted envelopes, and set rules for when they open after death.
No Backend
All data stays on your phone; no server, no cloud storage, and no third-party services.
Security Keys
Uses Apple's security keys and passkeys for identity without passwords or emails.
Key Split
Splits encryption keys among trusted contacts so no single person can access all secrets.
No Independent Audit
Has not been independently audited for security, though it passes basic design reviews.
No Hardware Wallet
Does not store hardware wallet seeds, which require independent security checks.
No Timestamp Lock
Uses a signed public record for timing but lacks a cryptographic time lock.
Open Source
Released under Mozilla Public License 2.0 with no third-party dependencies.
iOS Only
Requires iPhone or iPad running iOS 18 or later with no Android support.
No Subscription
One-time purchase with no recurring fees for accessing sealed envelopes.
Self-Verification
Users can verify sealed envelopes without trusting the app using a standalone Python script.
No Reproducible Builds
Cannot prove the app was built from the source code without Apple's developer account.
No Time Lock
Lacks a cryptographic time lock, so timing is handled through signed public records.
No Independent Security Review
Has not been reviewed by an independent security team for vulnerabilities.
Open Source Project
Single developer project with no company, funding, or investors.
At a glance
Seal stores encrypted family secrets on your phone with no backend, opening only after you die with trusted contacts
