PaperPhone IM

A WeChat-style, end-to-end encrypted instant messaging application.

Security

• Stateless ECDH + XSalsa20-Poly1305 — per-message ephemeral keys, forward secrecy without session state
• Zero-knowledge server — only ciphertext is stored; private keys never leave the device
• Four-tier key persistence — memory → localStorage → sessionStorage → IndexedDB, survives WebView restarts

Features

• 📹 Video & Voice Calls — WebRTC P2P (1:1) + Mesh (group up to 6)
• 🌐 Multi-language — Chinese, English, Japanese, Korean, French
• 📱 iOS PWA — "Add to Home Screen" via Safari, no enterprise cert needed
• 💬 Rich messaging: text, images, voice, emoji, delivery receipts, typing indicators
• 🗂️ Cloudflare R2 file storage (images & voice messages)

After Deployment

1. Open the domain assigned to the client service.
2. Register an account — cryptographic keys are generated locally on your device.
3. (Optional) Configure Cloudflare R2 for image/voice uploads — set R2_* variables on the server service.
4. (Optional) Configure Cloudflare TURN for cross-network video calls — set CF_CALLS_APP_ID and CF_CALLS_APP_SECRET.

Docker Hub Images

• facilisvelox/paperphone-client:latest
• facilisvelox/paperphone-server:latest