📡 DoomsdayMesh Communicator

Developed by @muneebwanee

DoomsdayMesh is the ultimate decentralized, offline survival communication and financial tool. Engineered for environments where cellular infrastructure, internet, and power grids have entirely collapsed.

It routes military-grade encrypted packets from device to device using Bluetooth Low Energy, Wi-Fi Direct, Acoustic Sound Waves, and 20km LoRa Radio hardware bridges.

🚀 The Titan Feature Set

🛡️ Extreme Cryptography & Security

• Hardware-Backed Encryption (TEE): AES-256-GCM keys are mathematically bound to the Android Trusted Execution Environment using Google Tink. Keys cannot be extracted.
• Geo-Fenced Decryption: Messages can be locked to exact GPS coordinates. They cannot be decrypted unless the receiver is physically standing at the safehouse.
• SQLCipher Database: All local messages are stored in an AES-256 encrypted SQLite database.
• Panic PIN & Nuclear Wipe: Entering a duress PIN instantly shreds the database, burns the cryptographic keys, and drops the user into a Fake Decoy OS populated by AI bots.
• Biometric Enforcement: Mandates Fingerprint/FaceID to access the encrypted mesh.
• Anti-Screenshot Environment: OS-level FLAG_SECURE blocks all screen recording and screenshots.

📡 Multi-Layered Transmission Routing

• P2P Cluster Mesh: Uses Google Nearby Connections to invisibly hop packets across crowds of smartphones (300ft range per hop).
• LoRa Radio Bridge: Connect a cheap SX1278 LoRa antenna via USB-C OTG to blast encrypted packets up to 20 Kilometers away.
• Acoustic Data Modem: If radios are actively jammed, the app falls back to transmitting binary data via inaudible ultrasonic sound waves.
• Local Web Portal: Hosts an onboard NanoHTTPD web server. Anyone can connect to your phone's Wi-Fi hotspot to view the emergency bulletin board via their browser.

💳 Offline Financial System

• USSD QR Payments: Scan offline QR codes to instantly trigger secure SIM-based financial transactions directly over cellular voice networks (e.g., *99#), completely bypassing the internet.

🏗️ Architecture Stack

• UI Engine: Jetpack Compose (Material 3, iOS-inspired minimalist theme)
• Local Database: Room + SQLCipher
• Networking: Nearby Connections, NanoHTTPD, Hoho USB Serial
• Cryptography: Google Tink API
• Background Tasks: Kotlin Coroutines & Android Foreground Services

⚙️ Build & Deployment Instructions

Note: Emulators do not possess the hardware radios (Bluetooth/Wi-Fi Direct) required to form the mesh. You must build to a minimum of TWO physical Android devices.

0. Clone the repository:

   git clone https://github.com/muneebwanee/DoomsdayMesh.git

1. Open the project in Android Studio Koala (or newer).

2. Connect two physical Android devices (Android 10+ recommended).

3. Click Run (Shift + F10).

4. Grant the Biometric, Location, Camera, Phone, and Nearby Devices permissions on both devices.

5. The mesh will automatically form within 5-10 seconds.

🛡️ Security Notice

This software contains experimental mesh-routing cryptography. While it uses industry-standard encryption primitives, the routing topology is designed for extreme offline scenarios. Use responsibly.

🤝 Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

📝 License-MIT