🚀 A full-stack browser extension and web platform providing real-time cybersecurity, scam detection, and personal data protection — powered by AI.
Sentinel Shield is a personal web guardian that runs directly in your browser. It protects users against phishing, scams, breached credentials, malicious websites, and QR code threats in real-time — all while maintaining privacy-first design.
This was developed as a final-year B.Tech project at SHUATS, demonstrating a deep understanding of:
- Real-time system architecture
- Chrome extension APIs
- AI-assisted threat detection
- Secure full-stack engineering
🧠 Stack: React (Vite) + Express.js + MongoDB + Chrome Extension API + Generative AI (Google) + VirusTotal & ExposedOrNot APIs
| Feature | Description |
|---|---|
| 🕵️♂️ Real-Time Threat Detection | Monitors emails, websites, passwords & QR codes for malicious behavior using APIs + local logic. |
| 📬 Email & Password Breach Lookup | Instantly notifies users if their credentials have been exposed. |
| 🔐 Password Strength Analyzer | Checks password quality and warns against weak or reused credentials. |
| 👤 Fake Identity Autofill | Generates realistic aliases to protect user privacy on untrusted forms. |
| 📩 Temporary Email Integration | Use throwaway email addresses via Emailnator — no spam, no exposure. |
| 🤖 AI-Powered Scam Detection | Analyses text/email content with Gemini API to flag suspicious patterns. |
| 🧭 Website Safety Score | Checks URL credibility using VirusTotal & URLVoid and alerts users live. |
| 📸 QR Code Scanner | Decodes and evaluates QR targets before you scan them. |
| 📊 User Dashboard | Interactive dashboard shows personal risk score, breach history, password ratings & more. |
| ✉️ Data Deletion Helper | Provide Steps or Generates templates to request account/data deletion from services. |
This architecture shows how the Sentinel Shield Chrome Extension interacts with the backend systems.
-
User Interface (UI)
The popup or browser action users interact with inside the Chrome Extension. It sends requests to both the Content Script and Background Script based on user actions. -
Content Script (Webpage Injection)
Injected into every page the user visits. Intercepts form fields, links, QR codes, and potentially dangerous elements. Sends threat detection requests to the backend. -
Background Script (Service Worker)
Acts as a central message router inside the extension. Communicates with content scripts, backend, and UI. Handles long-running tasks like authentication, breach checks, and caching. -
Express Backend Server
Node.js server responsible for:- Handling API requests from the extension
- Querying MongoDB for logs, breach data, and user profiles
- Interfacing with AI modules and threat intelligence APIs
-
MongoDB Database
Stores breach logs, scanned QR content, user session data, and security reports. -
Nodemailer
Sends OTPsto users securely.
| Component | Description |
|---|---|
| Chrome Extension (Frontend) | Built with React + Vite + CSS. Offers popup, toggles, right-click actions, and notifications. |
| Express Backend (Node.js) | Handles OTP auth, breach checks, threat analysis, API routing. Integrates with MongoDB. |
| MongoDB (Database) | Stores breach history, password scores, QR check logs, session data. |
| Content/Background Scripts | Inject logic into visited websites, analyze form fields, evaluate QR codes. |
| Generative AI Integration | Uses Google’s AI API to detect scam messages and evaluate text input. |
🧑💻 Deployed and tested by over a dozen users with varied digital habits.
- Prevented multiple scam link clicks in real time
- Detected >15 email breaches during demo
- Achieved within seconds detection latency for phishing websites
- Reduced fake sign-ups using autofilled aliases
- Ran seamlessly across Chrome, Edge, and Brave browsers
- 📱 Mobile app (Flutter/React Native)
- 🎮 Gamified user education (anti-phishing simulation)
- 🧾 One-click data deletion automation
- 🌐 Multi-language UI (for global access)
- 🛠️ Enterprise admin panel + usage analytics
Developed by Shiv Dwivedi
B.Tech (CSE) – SHUATS, Prayagraj
Cybersecurity enthusiast | AI Explorer | Full-stack developer
🧑🏫 Project Advisors:
- Dr. Tulika (Assistant Professor)
If this inspired you or helped you, give it a ⭐ on GitHub and drop a message.
Let’s make the web safer — together!