Telewish links two browsers directly — no server relaying your messages. Your chat is encrypted twice: once by WebRTC's built-in DTLS, and again with a fresh AES-256 key derived from the passphrase you speak to each other.
You'll only see this once a day on this device.
Telewish splits the connection code in half: one half is a code (QR or text), the other half is a short passphrase you share through a different channel. Both halves are needed — and they also salt the AES-256 key that encrypts every message on top of DTLS.
Uses a small relay server just to pass the handshake between you two — it only ever sees connection metadata, never your messages, which stay direct and encrypted once connected.
Show the QR or send the code — but keep the passphrase for a different channel. The code on its own can't connect to anything.
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Point your camera at the QR code on their screen.
Have them scan this with the in-app scanner · tap anywhere to close