SAFELINK-GUARD | Devpost

EVERY STEP WITH PROTECTION!!

🌟 Inspiration

India lost ₹22,845 crore to cyber fraud in 2024, with 36 lakh+ phishing incidents reported. Most attacks happen through fake UPI pages, malicious short URLs, and lookalike bank domains. Current security tools often rely on AI and heavy cloud resources, which are slow, non-explainable, and not suitable for low-internet regions.

We wanted a fast, lightweight, explainable, and offline-capable solution — something rural India & common users can trust. That’s how SafeLink Guard was born.

🛡 What It Does

SafeLink Guard is a rule-based real-time tool that detects and blocks phishing / malicious / fraudulent web links — without using ML.

✔ Detects dangerous URLs using Regex + Signature Matching ✔ Uses WHOIS + Domain Intelligence to verify domain age, TLD, trust score ✔ Generates a Risk Score (0–100) ✔ Blocks suspicious links instantly ✔ Works offline & provides explainable results ✔ Ideal for UPI fraud, banking scams & general phishing protection

⚙ How We Built It Module Tech Used Backend Python + Flask / FastAPI Rule Engine Regex + handcrafted URL signatures WHOIS Lookup python-whois Database Firebase / Local JSON Frontend React / HTML / JS Deployment Docker & Cloudflare Tunnel Optional Security API VirusTotal

Architecture: URL Input → Rule Engine → WHOIS Lookup → Scoring Engine → Block/Allow + Explanation

🧠 Challenges We Ran Into

Creating accurate regex patterns for phishing signatures

WHOIS response time & domain parsing issues

Avoiding false positives/negatives in rule engine

Making the model fully offline but still effective

Designing a clean UI for non-technical users

Ensuring low latency detection (<0.5 sec)

🏆 Accomplishments We’re Proud Of

Built a fully explainable security system — no AI “black box”

Got real-time results under 500ms

Lightweight & works without internet

Can be converted into a browser extension & SMS scanner

Directly supports India’s National Cybersecurity Mission

Successfully tested on 50+ phishing URLs

📚 What We Learned

The power of rule-based cybersecurity

Importance of explainable threat detection

Handling domain intelligence with WHOIS & signatures

Building user trust through transparency

How to convert a technical solution into a real product

🔮 What's Next for SafeLink Guard

🚀 Chrome / Edge Browser Extension 📱 Android App – URL Scanner 🧠 SMS & WhatsApp Link Detector ⚙ API Integration for Banks & Enterprises 🌐 National Cybersecurity Awareness Tool 🔒 AI-Hybrid Detection (Phase 2)