Maarg Manthan · Topic 14.16

Biometrics and Virtual Reality

Science & Technology › IT, Telecommunications and Computers · Topic 14.16

Biometrics are measurements of the body or behaviour that identify a person. Physical biometrics include fingerprints, iris patterns, facial features, palm veins and DNA, while behavioural biometrics include voice, signature, typing rhythm and gait. A biometric system captures a sample, converts it into a template, and compares it with stored templates. India's Aadhaar, run by the Unique Identification Authority of India since 2009, is the world's largest biometric identity system, using fingerprints, iris scans and a photograph. Virtual reality, VR, is a technology that places a person inside a computer-generated world using a headset and motion tracking, while augmented reality adds digital objects to the real world, and mixed reality blends the two.

5 min read · UPSC Prelims · Science & Technology · IT, Telecommunications and Computers

At a Glance

Physical biometrics Fingerprint, iris, face
Behavioural biometrics Voice, signature, gait
Indian system Aadhaar, UIDAI
VR Fully immersive
AR Digital overlay on reality
Exam link UPSC Prelims, Science & Technology: IT, Telecommunications and Computers

Where Does It Fit?

This topic follows the account of quantum computing. It covers two technologies that change how people are identified and how they experience digital content, and both raise privacy and ethical questions. Previous topic: Quantum Computing. Next topic: Encryption and Cybersecurity (Cyber Swachhta Kendra).

What Are Biometrics and How Do They Work?

Biometric	Features
Fingerprint	Patterns of ridges and valleys, captured with optical or capacitive sensors. Widely used in phones and attendance systems
Iris scan	Pattern of the coloured ring of the eye, very unique and stable. Used in Aadhaar
Face recognition	Measures distances between facial features. Used in phones, airports and policing. Aadhaar added face authentication in 2021
Voice recognition	Analyses voice patterns
Palm vein and retina	Patterns of blood vessels, harder to forge
Behavioural biometrics	Typing rhythm, gait and signature dynamics
Process	Enrolment, template storage, matching, and decision

What Are Aadhaar, Privacy Issues and VR Uses?

Aadhaar: 12-digit unique number issued by the UIDAI, based on fingerprints of ten fingers, two iris scans and a photograph, with a statutory basis in the Aadhaar Act, 2016
Authentication: Aadhaar based authentication verifies a person for services, subsidies and banking
Supreme Court, 2018: in K S Puttaswamy (Aadhaar) the court upheld Aadhaar as constitutional for welfare subsidies but struck down mandatory linking with bank accounts and mobile numbers
Privacy: biometric data cannot be changed if leaked, so storage and use need strong safeguards
Errors: false rejections can deny benefits to the poor or the elderly with worn fingerprints
Face recognition debate: concerns about surveillance and bias
Virtual reality: a fully computer-created environment, using a head-mounted display and controllers
Augmented reality: digital information overlaid on the real view, as in smartphone filters and navigation apps

What Else Should You Remember?

Mixed reality: digital objects that interact with the real world, as in some smart glasses
Uses of VR: training for pilots, surgeons and soldiers, gaming, virtual tours, therapy and education
Uses of AR: retail previews, maintenance instructions, navigation and education
Metaverse: a shared virtual space combining VR, AR and online worlds, still developing
Hardware: headsets with displays, sensors, controllers and tracking of head movement
Motion sickness: a common problem caused by a mismatch between what eyes see and what the body feels
India in VR: Indian start-ups and institutes use VR for training and heritage tourism
National Biometric rules: the Aadhaar Act restricts sharing of core biometric information, and the data protection law now applies, as in Cyber Law in India
Other Indian uses of biometrics: attendance in offices, passport and visa processing, e-passports and police databases
Biometric error rates: false accept rate and false reject rate are measured and balanced
Spoofing: fake fingerprints or masks can fool weak systems, so liveness checks are added
Link: display technology that powers headsets is in Display Technologies: Cathode Ray, LCD, LED, Plasma, OLED
Aadhaar enabled payment system: allows banking transactions using fingerprint and Aadhaar number, widely used in rural areas
E-passports: chips in passports store biometric data under international standards
Digital health IDs: the Ayushman Bharat Digital Mission uses ABHA numbers linked to Aadhaar or mobile number
Consent: data protection law requires consent and purpose limits for processing personal data including biometric data
Accuracy trade-off: systems set a threshold that balances letting in wrong persons against rejecting right ones, and the best choice depends on the risk of the service

Why Does It Matter for the Exam?

Biometric types: physical versus behavioural
Aadhaar facts: UIDAI 2009, Act 2016, 2018 judgment
VR versus AR: full immersion versus overlay
Current affairs link: face authentication and metaverse
Common errors: saying Aadhaar uses DNA or that VR adds objects to the real view

As an analytical point, biometrics make identification easy and reduce leakage in welfare, but biometric data is permanent and sensitive. Strong legal limits and security are needed, along with alternative methods for those with poor readings.

Why Is This Topic Important?

Types Biometric kinds
Aadhaar UIDAI and court
VR and AR Differences

What Came Next?

The next topic covers encryption and cybersecurity. Next topic: Encryption and Cybersecurity (Cyber Swachhta Kendra).

Key People and Terms

Biometric Body-based identifier
Template Stored digital pattern
UIDAI Aadhaar authority
VR Virtual reality
AR Augmented reality
Liveness detection Check that a real person is present

Exam Corner

Points to Remember

UIDAI created: 2009; Aadhaar Act: 2016.
Aadhaar uses fingerprints, iris, photo.
Supreme Court Aadhaar judgment: September 2018.
VR = fully immersive; AR = overlay.
Privacy as a right: 2017.

Do Not Confuse With

VR and AR Entire virtual world versus overlay on reality
Physical and behavioural biometrics Body features versus action patterns
Authentication and identification Is this who they say versus who is this

Memory Hook

Finger, iris, face for Aadhaar; VR takes you in, AR lays on top.

Mains Angle

Questions ask for biometric types and VR versus AR. These points help.

Benefits Identity and inclusion
Risks Privacy
Immersive tech Training and education

A Question You May Face

An original practice question, not a past paper question.

“Discuss the benefits and privacy concerns of biometric identification in India and the applications of virtual and augmented reality.”

How to Answer

Biometrics Types and Aadhaar.
Benefits Inclusion, leakage control.
Risks Privacy, errors.
VR and AR Uses.

GS Relevance

Prelims: types of biometrics, Aadhaar features, VR versus AR, applications. GS Paper 3: science and technology, IT; GS Paper 2: rights and privacy.

Frequently Asked Questions

What are biometrics?

Biometrics are measurable physical or behavioural characteristics used to identify a person, such as fingerprints, iris patterns, face, voice, signature and typing rhythm. A biometric system records a sample, turns it into a digital template and matches it against stored templates to verify or identify the person.

What biometric data does Aadhaar use?

Aadhaar, issued by the Unique Identification Authority of India, uses a photograph, ten fingerprints and two iris scans of each resident, linked to a 12-digit random number. Face authentication was added as another option in 2021. The Aadhaar Act, 2016 gives the system a legal basis and restricts sharing of core biometric information.

What did the Supreme Court decide on Aadhaar in 2018?

In September 2018 a five judge bench of the Supreme Court, in K S Puttaswamy versus Union of India, upheld the constitutional validity of Aadhaar for welfare benefits and subsidies, but struck down compulsory linking with bank accounts and mobile numbers and restricted its use by private companies, protecting privacy.

What is the difference between virtual reality and augmented reality?

Virtual reality completely replaces the real world with a computer-generated environment seen through a headset, so the user feels inside it. Augmented reality keeps the real world in view and overlays digital information or objects on it, as in smartphone camera filters and navigation arrows.

What are the uses of virtual reality?

Virtual reality is used for training pilots, surgeons and soldiers in safe simulations, for gaming and entertainment, virtual tours of heritage sites, therapy for fear and pain, and teaching complex subjects. Its benefit is a realistic experience at low risk and cost, though headsets can cause motion sickness.

PYQ Practice — Statement Analysis

1 Aadhaar uses fingerprints and iris scans.

True

Along with a photograph.

2 Augmented reality completely replaces the real environment.

False

That is virtual reality.

3 The Aadhaar Act was passed in 2016.