CCDATAJS: Client-Side Envelope Signing and Multi-Device Sync

SDK Overview

CCDATAJS is the foundational JavaScript/TypeScript cryptographic library used by both the CrypterChat web application and mobile clients to establish peer-to-peer encryption sessions.

Multi-Device Pre-Key Synchronization

When a user links a desktop client to their primary mobile device, CCDATAJS coordinates a QR-based Diffie-Hellman handshake, replicating active ratchets without exposing master keys to the network relay.