Documentation · Protocol v1.1

AlgoChat protocol docs

A cross-language, end-to-end encrypted messaging protocol. X25519 + ChaCha20-Poly1305 + HKDF-SHA256, with an optional ratcheting pre-shared-key mode for defense-in-depth. One wire format, six implementations, conformance-tested against shared vectors.

Read the spec → Implementation guide Try the demo ↗

Getting started

Overview

What AlgoChat is, what it is not, use cases, economics, and the security properties at a glance.

Specification

Protocol specification

The full v1.1 wire format: envelope layout, key derivation, encryption, decryption, PSK ratcheting, and constants.

Implementation guide

Language-agnostic pseudocode for every core function: key derivation, encrypt, decrypt, serialization, key discovery, and PSK mode.

Test vectors

Canonical, deterministic test vectors for cross-implementation verification: key derivation, envelopes, round-trips, and PSK ratcheting.

Security

Security & threat model

What AlgoChat protects against and what it does not: cryptographic guarantees, key management, PSK security properties, and known limitations.

Implementations

Every language target conforms to the spec on this page. Browse them in the projects catalogue, or jump straight to a repo.