NIP-340 proposes conventions for using FROST (Flexible Round-Optimized Schnorr Threshold) threshold signing on Nostr. FROST allows a group of signers to collectively control a Nostr identity where any t-of-n members can sign events without reconstructing the full private key.

How It Works

A FROST quorum distributes key shares among n participants. Any t (threshold) of those participants can collaborate to produce a valid Schnorr signature for the shared Nostr pubkey. No single participant ever holds the complete private key, and fewer than t participants cannot sign. The NIP defines how to coordinate signing rounds, distribute key shares, and publish threshold-signed events over Nostr relays.

Use Cases

  • Organizational accounts: A project team controls a shared Nostr identity without any single member having full signing authority
  • Custody: Multi-party signing for sensitive operations
  • Release verification: Decentralized signing of software release events

Implementations

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