Kobra Messenger is end-to-end encrypted messaging with mesh networking. No central server. No backdoors. Just cryptographic truth.
Every conversation starts with ephemeral key exchange, then ratchets forward. Forward secrecy, always.
Set a TTL on any message. After reading, it vanishes from both devices. No trace, no logs.
Wi-Fi Aware + Bluetooth for direct peer discovery. Works offline — festivals, protests, wilderness.
A second PIN that silently wipes all data under coercion. Plausible deniability built in.
Route all relay traffic through Tor. IP obfuscation, no metadata leaks. Enable SOCKS5 in settings.
Keys sealed behind 6+ digit PIN. Optional biometric. Weekly re-auth so you never forget.
Ed25519 signing + X25519 DH keypairs created locally. Private keys never touch the network.
Prekeys, signed prekeys, and ephemeral keys via QR scan. Shared secret derived offline.
Every message advances a new key. Even if one is broken, past and future stay sealed.
AES-GCM-256 with unique IVs. Relay sees only noise. Zero plaintext metadata.
X3DH, Double Ratchet, QR contacts, BLE mesh, relay, Wizz, ephemeral messages.
Tor proxy, 14-language i18n, media viewer, runtime root detection.
Device linking, encrypted backups, version expiry, legal acceptance.
Sender Keys group encryption, admin tools, member exclusion.
Full test suite, RuntimeSecurityChecker, architecture docs, public release.
Push notifications, message search, contact blocking, channels.
External cryptographer audit, formal verification, bug bounty.
APK direct download · F-Droid · Play Store (soon)