Liveness Detection and Biometric Authentication System (BAS)

Abstract

The increasing use of digital services, mobile devices, online platforms, and electronic access- control systems has created a growing need for reliable and secure user authentication. Traditional authentication techniques such as passwords, personal identification numbers, and security questions are vulnerable to theft, guessing, sharing, phishing, and other forms of unauthorized access. Biometric authentication provides an alternative approach by identifying or verifying individuals based on unique physiological or behavioural characteristics such as facial features, fingerprints, iris patterns, and voice characteristics. However, biometric systems are also exposed to presentation attacks in which an attacker attempts to deceive the authentication system using a photograph, recorded video, artificial fingerprint, mask, or other fabricated biometric representation. Liveness detection is therefore an important security mechanism for determining whether a biometric sample originates from a genuine living person who is physically present during authentication. This study presents a practical approach to the design and implementation of a Liveness Detection and Biometric Authentication System . The proposed system integrates biometric verification with liveness detection to reduce the possibility of unauthorized access through spoofed biometric samples. The system captures a user's biometric sample, performs preprocessing and feature extraction, determines whether the presented sample is live or a potential presentation attack, and proceeds to biometric matching only when the sample passes the liveness assessment. The research adopts a quantitative experimental design involving biometric samples representing genuine users and simulated presentation attacks. The proposed framework considers techniques such as facial feature analysis, blink detection, facial movement, texture analysis, image quality assessment, and machine learning classification. The performance E-ISSN 2545-529x of the proposed system can be evaluated using biometric and presentation-attack metrics including accuracy, false acceptance rate, false rejection rate, precision, recall, F1-score, Attack Presentation Classification Error Rate , and Bona Fide Presentation Classification Error Rate . The study demonstrates that combining biometric authentication with liveness detection provides stronger protection than relying on biometric matching alone. The proposed system can therefore contribute to secure access control, identity verification, digital services, attendance systems, financial applications, and other environments where reliable user authentication is required.

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