Unique Identification Authority of India (UIDAI): Aadhaar

Core Mandate and Vision

The UIDAI was established with the vision to empower residents of India with a unique identity and a digital platform to authenticate "anytime, anywhere." Its primary mandate is to issue a 12-digit unique identification number to every resident of India based on their demographic and biometric data.

The key objectives include: * De-duplication: Ensuring that one person has only one Aadhaar number, effectively eliminating "ghost" and duplicate beneficiaries in welfare schemes. * Cost-Effective Delivery: Streamlining government subsidies and services by enabling direct transfers to beneficiaries. * Portable Identity: Providing a valid proof of identity that is accepted across the country, bridging the documentation gap for the underprivileged.

Key Products and Resident Services

UIDAI offers an extensive array of digital and physical products designed to ensure that the Aadhaar identity is accessible, secure, and versatile.

1. Digital Identity Formats

• e-Aadhaar: A password-protected electronic copy of the Aadhaar letter, digitally signed by UIDAI. It is legally equivalent to the physical copy for all purposes.
• mAadhaar App: A mobile application (available on iOS and Android) that allows residents to carry their Aadhaar profile in a digital wallet. Key features include biometric locking/unlocking, generation of Virtual IDs (VID), and sharing of e-KYC data.
• Masked Aadhaar: A version of e-Aadhaar that hides the first eight digits of the Aadhaar number, showing only the last four digits for enhanced privacy during verification.

2. Physical Identity Products

• Aadhaar PVC Card: A durable, weather-proof plastic card issued by UIDAI. As of 2026, the card features updated security elements, including a secure QR code with a photograph and demographic details.
• Aadhaar Letter: The standard printed document sent to residents upon successful enrolment or update.

3. Enrolment and Update Infrastructure

• Aadhaar Seva Kendras (ASKs): Dedicated state-of-the-art centers for new enrolments, biometric updates (fingerprints, iris, and photo), and demographic updates.
• Mandatory Biometric Update (MBU): A critical service for children who enrolled before the age of 5 or 15, ensuring that their biometric records remain accurate as they age.

Authentication and Ecosystem Services

The true power of UIDAI lies in its authentication framework, which allows third-party entities to verify a resident's identity with their consent.

1. Aadhaar-Based Authentication

• Biometric Authentication: Real-time matching of fingerprints or iris scans against the UIDAI central database.
• Face Authentication (FaceRD): A touchless mode of verification launched to assist residents with worn-out fingerprints. By 2025-2026, Face Authentication has scaled significantly, surpassing 200 crore transactions.
• OTP-Based Authentication: A secure two-factor authentication method using a one-time password sent to the resident's registered mobile number.

2. KYC and Financial Services

• e-KYC (Electronic Know Your Customer): A paperless process where a resident's demographic and photograph data are shared electronically with a Service Provider (like a bank or telecom company) with the resident's consent.
• Aadhaar Paperless Offline e-KYC: A secure, digitally signed XML file that residents can download and share with entities for offline verification without disclosing their actual Aadhaar number.
• Aadhaar Enabled Payment System (AePS): A bank-led model which allows online interoperable financial inclusion transactions at MicroATMs through Business Correspondents (Bank Mitras) using Aadhaar authentication.

Institutional and Developer Support

UIDAI provides specialized tools for the ecosystem partners and developers to build secure applications on top of the Aadhaar platform.

• Aadhaar Data Vault: A centralized storage solution for organizations to store Aadhaar numbers in an encrypted format, replacing them with "Reference Keys" to enhance data security.
• UIDAI Sandbox: A secure environment for developers and fintech companies to test their Aadhaar-integrated solutions before deployment.
• Udai (उदय) - The Aadhaar Mascot: Launched in early 2026, the mascot serves as a digital assistant and public face for Aadhaar-related communications, helping residents navigate updates and security protocols.

Recent 2026 Developments and Security

As of January 2026, UIDAI has implemented several major policy and technological updates: * Compulsory PAN-Aadhaar Linking: Effective from January 1, 2026, the integration between the Permanent Account Number (PAN) and Aadhaar has become mandatory for all financial services to prevent fraud and tax evasion. * Free Document Update Extension: The window for residents to update their identity and address documents online (for records older than 10 years) has been extended to June 14, 2026, to ensure the continued accuracy of the database. * Deceased Identity Management: UIDAI has intensified the process of deactivating Aadhaar numbers of deceased individuals through data sharing with state birth and death registries.

UIDAI continues to iterate on its "Privacy by Design" principle, ensuring that biometric data is never shared and that every authentication request is strictly based on the resident's explicit consent.