EncryptRoom lets you create a private terminal chat and share invite-enabled apps for Windows, macOS, and Linux. Users open the app, enter a display name (and room password if required), and chat live in the terminal. Security uses HMAC room auth, X25519 + HKDF-SHA256 key derivation, and ChaCha20-Poly1305 encryption with replay protection. The relay only forwards ciphertext in memory and stores no message history.