Secure bi lock system

The Smart Secure Bio-Lock System Based on Sensing Methodology is a graduation project designed to enhance security and convenience through advanced biometric and cryptographic technologies. The system combines fingerprint recognition with NFC (Near Field Communication) and cryptographic algorithms to create a highly secure and user-friendly locking mechanism.

Objective

The main goal of this project is to develop a smart biometric lock system that ensures authentication, confidentiality, integrity, and non-repudiation using modern encryption and hashing techniques.

System Overview

The system integrates:

•Biometric Fingerprint Sensor for identity verification.

•NFC communication for data exchange between the user’s card and the Arduino controller.

•Elliptic Curve Cryptography (ECC) for key generation and exchange.

•SHA-512 for hashing user data securely.

•AES-256 encryption for ensuring data confidentiality.

•Digital Signature Algorithm (DSA) for message authentication and integrity verification.

Two operational models were developed:

1.Model 1: Authentication without OTP verification.

2.Model 2: Authentication with OTP verification for higher security.

Methodology

The project followed a structured development process:

1.Data Collection: Selecting and preparing biometric data.

2.System Development: Writing and testing embedded C code on Arduino.

3.Simulation and Testing: Evaluating system performance, encryption efficiency, and resistance to common cyberattacks.

Security Features

The system effectively mitigates common attacks such as:

•Eavesdropping attacks – through limited access attempts and encrypted communication.

•Replay attacks – by using OTP verification.

•Denial-of-service attacks – via card shielding mechanisms.

•Modification attacks – by applying digital signatures.

Results

Testing demonstrated strong performance in:

•Fast processing and key generation times.

•Low channel overhead (around 1056–1104 bits).

•Secure authentication with minimal execution delays.

Applications

The system has dual applicability:

•Military Use: Secure access control for restricted areas.

•Civilian Use: Smart home locks, financial transactions, and medical department security systems.