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x3dh

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Secure messaging without smartphones. Native SimpleX Protocol implementation in C for embedded systems. Features Hardware Abstraction Layer supporting multiple MCU platforms, hardware security modules, and three device tiers from maker-friendly to state-level protection.

  • Updated Feb 23, 2026
  • C

🛡️ Quantum-resistant P2P chat 💬 with 🧱 multi-layered security. Implements ✨ Hybrid X3DH+PQ (ML-KEM & FALCON), ⚙️ Double Ratchet, and 🔑🤝 end-to-end authenticated key exchange for 🎖️ military-grade, 🚀 future-proof communication.

  • Updated Jul 15, 2025
  • Python

Wrapper for libsignal, implementing the Signal Protocol for end-to-end encryption. Features Double Ratchet, X3DH, Sealed Sender, Group Messaging (SenderKey), and Kyber post-quantum key exchange. Optimized for Flutter and cross-platform applications (Android, iOS, Linux, macOS, Windows). AGPL-3.0 Licensed.

  • Updated Feb 20, 2026
  • Dart

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