JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III BIOMETRICS Previous Question Paper (September - 2021 - R18)

Biometric matching is the process of comparing a captured biometric sample against a stored template to determine if they originate from the same individual. The process typically involves four stages: capture, extraction, comparison, and decision.

Consider a fingerprint recognition system:

1. Capture: A sensor scans the user's fingerprint to create a digital image.
2. Extraction: The system identifies unique features known as minutiae (ridge endings and bifurcations) and converts them into a mathematical template.
3. Comparison: The system compares this new template against a previously enrolled template stored in the database using an algorithm that calculates a similarity score.
4. Decision: If the similarity score exceeds a predefined threshold, the system grants access; otherwise, it denies it.

Biometric applications are categorized by their security requirements and operational environments:

• Forensic Applications: Used by law enforcement for criminal identification, corpse identification, and parenthood determination. It relies on high-accuracy traits like DNA or fingerprints.
• Government Applications: Includes national ID cards, passport issuance, border control (e-passports), and voter registration to prevent identity fraud and ensure secure identification.
• Commercial Applications: Used for physical access control (office buildings, server rooms) and logical access control (logging into computers, mobile devices, or banking apps).
• Healthcare: Ensures secure access to patient electronic health records and prevents medical identity theft during insurance claims.
• Financial Services: Facilitates secure ATM transactions, mobile payments, and online banking authentication, replacing traditional PINs or passwords.
• Public Welfare: Used in government subsidy distribution systems to ensure benefits reach the intended beneficiaries and to eliminate duplicate or ghost entries in databases.