🛡️ SmartIP Fraud Detection System (C++)

A security-focused C++ project that simulates fraud detection by validating user credentials, verifying trusted IP addresses, checking transaction IDs, and logging suspicious or secure activities using file-based storage.

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🚀 Overview

The SmartIP Fraud Detection System enhances transaction security by running multiple validation layers before approving access:

1. User authentication (User ID + Password)
2. Trusted IP address verification
3. Transaction ID validation
4. Geolocation reference
5. Fraud / success logging

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✨ Features

Feature	Description
User Authentication	Verifies User ID and Password from users.txt
Trusted IP Validation	Checks IP against trusted addresses in known_ips.txt
Transaction Verification	Validates transaction IDs using transaction_ids.txt
Fraud Logging	Logs suspicious activity to fraud_log.txt
Success Logging	Logs approved transactions to transaction_success_log.txt
Geolocation Support	Reads country, region, and city from geoInfo.txt

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📂 Project Structure

SmartIP-Fraud-Detection/
├── smart_ip_fraud_detection.cpp     → Main C++ source code
├── users.txt                        → Sample user credentials
├── known_ips.txt                    → Trusted IP addresses
├── transaction_ids.txt              → Valid transaction IDs
├── geoInfo.txt                      → Location information
├── transaction_success_log.txt      → Successful transaction logs
├── fraud_log.txt                    → Fraud / suspicious activity logs
└── README.md                        → Project documentation

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▶️ How to Run

Option 1 — Dev C++:

• Open smart_ip_fraud_detection.cpp in Dev C++
• Ensure all .txt files are in the same project directory
• Compile and Run

Option 2 — g++ (Terminal):

g++ smart_ip_fraud_detection.cpp -o fraud_detection
./fraud_detection

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🖥️ Sample Workflow

Enter User ID:
Enter Password:
Enter IP Address:
Enter Transaction ID:

The system then:

1. Validates credentials against users.txt
2. Checks IP against known_ips.txt
3. Verifies transaction ID against transaction_ids.txt
4. Logs result to either fraud_log.txt or transaction_success_log.txt

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🧠 Skills Demonstrated

• File handling (ifstream, ofstream)
• User authentication logic
• IP validation and trust management
• String parsing and sanitization
• Rule-based fraud detection
• Logging systems design
• Real-world security workflow simulation

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🌍 Real-World Applications

This project simulates concepts used in:

• Banking fraud detection systems
• Secure login monitoring
• Transaction verification pipelines
• IP trust management
• Cybersecurity prototypes

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🔮 Future Improvements

• Password hashing
• MySQL / Database integration
• Multi-factor authentication
• Real-time geolocation API integration
• Admin dashboard
• GUI-based interface

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🤝 Contributing

Pull requests are welcome! For suggestions, improvements, or security enhancements, feel free to open an issue.

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👨‍💻 Author

Keshav Kumar Sharma
B.Tech CSE | Full Stack Development | Problem Solver | Open Source Contributor