Non-Custodial Wallet Key Management

OpenSigner is an open-source, self-hostable key management system that issues non-custodial keys to users. Keys are split 2-of-3 using Shamir's Secret Sharing, so no single party can sign alone. The full key exists only in memory inside a sandboxed iframe and is discarded after every operation. Users can recover keys with a password, passkey, or automatic recovery using OTP, without seed phrases. The project is licensed under MIT and can be run with Docker or split across independent operators.