Secure Messaging

⚠️ Disclaimer: This code should not be used in real-world production environments.
It is primarily an experimental and educational project, with about 90% of the code generated with AI assistance.
Bugs, inefficiencies, and security weaknesses may exist.

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📌 Overview

Secure Messaging is an experimental multi-layer encrypted messaging framework.
It combines several symmetric and asymmetric cryptographic layers, including post-quantum algorithms, to provide enhanced message confidentiality.

The system is designed for research, testing, and educational purposes.

💡 Contributions Welcome: This project is open for suggestions, improvements, and fixes.
If you have ideas or corrections, feel free to submit them — your contributions are highly appreciated!

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✨ Features

• 🔑 Post-Quantum Key Exchange using Kyber and ECDH — resolves into a 90-byte long hybrid key
• 🖊️ Digital Signatures using Dilithium and Ed25519 — resolves into a hybrid authentication
• 🔐 TLS 1.3 authentication
• 🔒 Multiple symmetric encryption layers:
  • AES (Advanced Encryption Standard)
  • ChaCha20
  • Serpent Cipher
  • OTP (XOR-based one-time pad)
• 🖥️ Simple GUI interface for sending/receiving messages
• 📂 Modular encryption layers for experimentation
• 🖼️ Includes a custom application icon (lock.ico)

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🚀 Installation

Requirements

• Python 3.11+
• Recommended OS: Windows / Linux / macOS

💡 Contributions & Fixes: If you find any issues during installation, feel free to open a pull request or submit a bug report.
Your help improves this project!

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Installation

You can either download it from Releases or build it yourself using PyInstaller.

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Setup

• Run the .exe. It may take a little time for the application to start and generate all required files.
  👉 I recommend creating a new folder for it because of the generated config files.

• This application will require a minimum of 700 MB of disk space.

• For the program to work with two peers, they need to share certain files, which either peer must generate.
  👉 I recommend sharing them only through physical transfer (USB stick, cable, etc.), never via network or cloud storage — otherwise, it defeats the whole point of the design.

• Once the application is running, close it and copy the entire folder to the other device using a USB stick.
  Then copy my_dilithium_pub.bin into the other peer’s folder and rename it to peer_dilithium_pub.bin.
  Once this is complete, repeat the same step in reverse for the other peer.

• Then connect! If everything is done correctly, you should be able to connect after entering the IP and port.
  👉 I recommend keeping the default port 9000.

• Click the Generate Pad button and choose the program’s folder as the directory.

• Try sending a simple message such as "hi" or "hello world".

• On the sender’s side, the program will generate 3 folders:

  • Serpent_keys
  • AES_keys
  • Chacha_keys

• You must copy these three folders (without editing them) along with the generated pad into the other peer’s folder.

• Make sure both peers have their pads loaded.
  If not, click Browse and select the directory manually.

✅ That’s it! The program will remember everything after setup.

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⚠️ Notes & Known Issues

• There is a known GUI bug: it sometimes displays "Pad X" as if not loaded.
  👉 However, try sending a message anyway — if it works, it’s only a visual bug.

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📧 Support

If you encounter any problems or have suggestions, please write to:
📩 bobberkamamlus@gmail.com

Any help, bug reports, code suggestions, or fixes are highly appreciated!
If you have improvements, feel free to share them — contributions are always welcome.