gun

Designed for privacy-preserving and censorship-resistant applications, GUN uses a distributed architecture where each client holds a portion of the data graph and peers sync directly with one another creating a system that continues functioning even when individual nodes go offline or servers become unavailable.

The protocol handles conflict resolution automatically through a last-write-wins CRDT mechanism with cryptographic user identity, allowing multiple users to update shared data concurrently without coordination overhead.

GUN includes a built-in user authentication system based on elliptic curve cryptography, enabling end-to-end encrypted data storage where only the key holder can read their own records a capability that makes GUN suitable for building private messaging, decentralized social networks, and personal data vaults.

GUN is implemented in JavaScript and runs in both browser and Node.js environments, with the same API surface across client and server. It can use localStorage, IndexedDB, or filesystem adapters for persistence, and relay peers can be self-hosted on any infrastructure.

The project is open-source under the Zlib license and has been used to build decentralized applications spanning social networks, collaborative editing tools, supply chain tracking systems, and peer-to-peer marketplaces.

The cybersecurity protocol framing reflects GUN's use in adversarial network environments where data availability and user privacy are security properties rather than nice-to-haves.