🛡️ Security System Architecture

A comprehensive, robust, and highly-optimized remote security and administration system designed for Windows PCs, controllable entirely via a Mobile App.

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🌟 Overview

This project is a multi-layered security system that allows users to remotely control, monitor, and secure their Windows machines through a dedicated mobile application. It leverages a lightweight Rust service running in the background, minimizing CPU and RAM overhead, while providing instantaneous WebSocket-based communication through a cloud relay.

Core Features

• ⚡ Remote PC Lock & Control: Lock your PC screen instantly from anywhere.
• 🛡️ USB Port Blocking: Prevent unauthorized physical data access by disabling USB mass storage devices.
• 📸 Stealth Camera Capture: Remotely trigger the webcam to take silent snapshots and securely send them to your mobile app.
• 🛑 Secure Service Hibernation (OTP): Suspend the background service to save resources via a secure 6-digit OTP verified between the PC and Mobile App.
• ☁️ Seamless OTA Updates: Hot-update the background services without ever needing to uninstall or manually disrupt the system operations.
• 📱 QR Code Pairing: Easy and secure zero-config pairing between the Mobile App and the PC using QR codes.

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🏗️ System Architecture & Data Flow

The system consists of 4 highly decoupled modules:

graph LR
    subgraph Client [📱 Mobile App]
        Mobile[Expo React Native]
    end

    subgraph Server [☁️ Cloud Relay]
        Relay[Node.js + Socket.IO]
    end

    subgraph Desktop [💻 Windows PC]
        UI[SecurityApp - Tauri/React]
        Service[Background Service - Rust]
        Watchdog[Watchdog Service - Rust]
    end

    Mobile <-->|Encrypted Commands| Relay
    Service <-->|Socket.IO Events| Relay
    UI <-->|Named Pipes IPC| Service
    Watchdog -->|Process Monitoring| Service
    UI -.->|QR Code Pairing| Mobile

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1. Service (Rust): The core engine. Runs as a NT AUTHORITY\SYSTEM service. It maintains a persistent Websocket connection to the Cloud Relay, executes hardware-level commands, and exposes a Named Pipe for the PC UI.
2. SecurityApp (Tauri + React): The local management dashboard. Used strictly for initial setup, QR code pairing, generating OTPs, and triggering OTA updates.
3. ControlApp (React Native / Expo): The remote control center. Allows the user to monitor activity logs and send security commands on the go.
4. Cloud (Node.js + Express): A lightweight, stateless intermediary router that bridges the Mobile App and the Windows Service. It also hosts static binaries for OTA (Over-the-Air) updates.

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🚀 Installation & Setup Guide

Follow these steps to deploy the entire security suite from scratch.

1. Deploy the Cloud Relay

1. Navigate to the Cloud directory.
2. Deploy this folder to a Node.js hosting provider (e.g., Render, Heroku, or an AWS EC2 instance).
3. Once deployed, note down your server URL (e.g., https://my-security-relay.onrender.com).

2. Build the PC Installer

For maximum convenience, an automated build pipeline is provided. You need Rust, Node.js, and Tauri CLI installed on your machine.

1. Double-click the build.bat file located in the root of the project.
2. The script will automatically compile the Rust services (--release), build the Tauri UI, and package everything into a single Security_Installer.zip archive.
3. Extract Security_Installer.zip and run installer/install.bat as Administrator.
4. The system will automatically register the services and launch the PC UI.

3. Setup the Mobile App

1. Navigate to the ControlApp directory.
2. Install dependencies:

   npm install

3. Start the Expo development server:

   npx expo start

4. Use the Expo Go app on your iOS or Android device to scan the QR code shown in your terminal. (Alternatively, use EAS Build to generate a standalone .apk or .ipa).

4. Pairing & Usage

1. Open the Security App on your Windows PC.
2. Ensure the "Server Relay URL" field matches your deployed Cloud Relay URL.
3. Open the Mobile App, log in, and click Scan QR to Pair.
4. Point your phone camera at the QR code displayed on the PC screen.
5. Done! Your devices are securely paired. You can now remotely lock the PC, disable USB ports, or take stealth photos.

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🛠️ Developer Commands

• OTA Updates: Compile new .exe files in Service, place them in Cloud/public/updates/, increment the version.json, and push to your server. Users can update via a single click in the PC UI.
• Service Logs: Debug logs for the Windows Service can be found at C:\Windows\Temp\security_service.log.

Engineered for Security, Optimized for Performance