nmemmertandClaude Sonnet 4.6
937bf8ad2d
- Zero-knowledge architecture: all encryption/decryption client-side via Web Crypto API - AES-GCM 256 for messages, files, and key wrapping; PBKDF2 for password-based key derivation - Node.js/TypeScript backend: JWT auth with refresh rotation, argon2id passwords, TOTP 2FA - PostgreSQL schema: encrypted blobs only, server never stores plaintext - Real-time messaging via WebSocket relay (server routes ciphertext, cannot read it) - Encrypted file upload/download with per-file keys wrapped by user master key - React PWA frontend: Vite + Tailwind + service worker for offline support - Docker Compose: postgres + backend + frontend + nginx with TLS Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>