New Delhi: Aadhaar biometric identity system has become the backbone of India’s digital identity ecosystem, with around 134 crore active users, according to the government.
The system, managed by the Unique Identification Authority of India (UIDAI), is now the largest biometric identity system in the world and continues to expand with strong focus on privacy and security. The government has emphasized that Aadhaar data remains encrypted and is processed only within India, ensuring high levels of protection for citizens.
Latest Stats of Aadhaar Biometric Identity System
The government stated that Aadhaar has reached an unprecedented scale:
- Over 134 crore live Aadhaar holders
- More than 17,000 crore authentication transactions completed
- Widely used for identity verification across services
Read also: UIDAI Launches Bug Bounty Programme to Strengthen Aadhaar Security and Protect Citizen Data
This makes Aadhaar the largest biometric database globally, supporting welfare delivery, banking, telecom, and government services.
How Aadhaar Biometric Identity System Works
UIDAI provides authentication services to authorized agencies to verify identity.
Key Authentication Methods:
- OTP-based verification
- Biometric authentication (fingerprint, iris, face)
- Demographic details verification
The system ensures that individuals can securely access services without sharing sensitive data unnecessarily.
AI-Based Face Authentication
Aadhaar also uses AI and Machine Learning technology for face authentication, improving accuracy and reducing fraud risks.
Strict Data Privacy and Security Measures
The government highlighted multiple layers of security in Aadhaar:
- Data is encrypted at rest and during transmission
- Storage and processing happen only within India
- The Aadhaar Act restricts data collection, usage, and retention
These safeguards are designed to protect users’ personal information at every stage.
Three-Tier Audit System for Strong Monitoring
UIDAI has implemented a multi-layered audit system to ensure safety:
- Self-Compliance Audit
- Information Security Annual Audit
- GRCP (Governance, Risk, Compliance & Privacy) Audit
This system helps maintain transparency, accountability, and security across the ecosystem.
What are the Rules for Agencies Using Aadhaar
Only authorized entities can use Aadhaar services. They must register as:
- Authentication User Agencies (AUA)
- KYC User Agencies (KUA)
They must follow strict rules under the Aadhaar Act to ensure safe usage.
Aadhaar Biometric Identity System: Key Privacy Safeguards for Users
The government listed important protections built into Aadhaar:
- Mandatory user consent before authentication
- Authentication only for specific permitted purposes
- No storage of biometric data by agencies
- Use of certified devices only
- Limited and encrypted data retention
- Mandatory audit trails for tracking usage
These measures ensure that Aadhaar remains secure and misuse-resistant.
Access to Aadhaar Authentication Logs
- Logs are stored for 2 years by agencies
- Can be accessed by users for grievance redressal
- Archived for 5 more years, then deleted
This ensures both transparency and accountability in the system.
Read also: Aadhaar Vision 2032: India’s Bold Step Toward AI-Driven, Privacy-First Digital Identity
