Services
Messenger
End-to-end encrypted chat, calls and file sharing.
Messenger
The TheRedStonee Messenger (chat.theredstonee.de) is an end-to-end encrypted messenger: text
messages, voice/video calls, screen sharing, files and voice messages — only you and your contact can
read along.
How the encryption works
Zero-knowledge: On first launch you set a passphrase. It protects your private key, which
never leaves your browser. The server only stores ciphertext and can't read anything.
- Identity: one key pair per user (ECDH P-256). The private key is encrypted with your passphrase (PBKDF2 → AES-GCM) and stored zero-knowledge on the server.
- Messages: encrypted with the shared key (ECDH) using AES-256-GCM.
- Calls: LiveKit E2EE — the room key is sealed to your contact via ECDH; the server only relays encrypted frames.
Features
| Feature | Description |
|---|---|
| Text chat | E2E-encrypted messages, real-time |
| 📞 Calls | Voice, video & screen sharing (E2E) |
| 📎 Files | encrypted, with image preview |
| 🎤 Voice messages | record → encrypt → player |
| Contacts | via the friends system (add by name/ID) |
Setup
- Sign in on
chat.theredstonee.dewith your account. - Set a passphrase (first time) or enter it (to unlock).
- Add a contact, then message or call.
The passphrase is not recoverable. If you lose it, old messages can no longer be decrypted.
The messenger is also available as an Android app (TRS Chat) with the same E2E principle.