The Unique Identification Authority of India (UIDAI) is the statutory authority responsible for India's Aadhaar system. It issues Aadhaar numbers, manages enrolment and updates, operates Aadhaar authentication infrastructure and sets the rules and security standards followed across the Aadhaar ecosystem.
UIDAI functions under the Ministry of Electronics and Information Technology (MeitY). Although it was first constituted in 2009, it became a statutory authority on 12 July 2016 under the Aadhaar Act, 2016.
UIDAI at a Glance
| Particular | Details |
|---|
| UIDAI full form | Unique Identification Authority of India |
| Type | Statutory authority |
| First constituted | 28 January 2009 |
| Became a statutory authority | 12 July 2016 |
| Governing law | Aadhaar Act, 2016 |
| Ministry | Ministry of Electronics and Information Technology |
| Headquarters | New Delhi |
| Primary responsibility | Managing Aadhaar enrolment, authentication and related services |
| Official website | uidai.gov.in |
| Aadhaar helpline | 1947 |
Why Are Both 2009 and 2016 Associated With UIDAI?
UIDAI was first constituted on 28 January 2009 as an attached office of the Planning Commission. Its task was to develop and implement India's unique identification programme.
The first Aadhaar number was issued on 29 September 2010.
The Aadhaar Act was enacted in 2016, giving the programme a statutory framework. On 12 July 2016, UIDAI became a statutory authority under the Act and began functioning under MeitY.
So, the two dates refer to different stages:
2009: UIDAI was created as a government office.
2016: UIDAI became a statutory authority under the Aadhaar Act.
What Does UIDAI Do?
UIDAI manages the Aadhaar system throughout its lifecycle, from enrolment to identity verification.
Issues Aadhaar numbers
UIDAI issues Aadhaar numbers after eligible residents complete the prescribed enrolment and verification process.
Aadhaar is a 12-digit random number. The number itself does not encode details such as religion, caste, income or geographical location.
Manages enrolment and Aadhaar updates
UIDAI defines the processes and standards followed for new Aadhaar enrolments and updates to demographic or biometric information.
It also sets requirements for enrolment centres, registrars and other authorised entities participating in the Aadhaar ecosystem.
Operates Aadhaar authentication
UIDAI maintains the infrastructure that enables authorised entities to verify Aadhaar holders using permitted authentication methods such as OTP, demographics or biometrics.
Sets operating and security standards
Organisations involved in Aadhaar enrolment, authentication or verification must follow applicable UIDAI regulations, technical specifications and security requirements.
Manages Aadhaar records
UIDAI maintains identity and authentication records within its Central Identities Data Repository, or CIDR, subject to the provisions of the Aadhaar Act and related regulations.
UIDAI vs Aadhaar: What is the Difference?
UIDAI and Aadhaar are related, but they are not the same.
| UIDAI | Aadhaar |
|---|
| Unique Identification Authority of India | A 12-digit identification number |
| A statutory authority | Issued to eligible residents |
| Manages the Aadhaar system | Used for identity verification |
| Sets enrolment and authentication rules | Can be verified using permitted authentication methods |
| Functions under MeitY | Managed by UIDAI |
What UIDAI Services Can Aadhaar Holders Use?
UIDAI provides several services through the MyAadhaar portal, Aadhaar App and Aadhaar centres.
Download e-Aadhaar
Aadhaar holders can download a digital copy of their Aadhaar through MyAadhaar.
e-Aadhaar is digitally signed by UIDAI and is considered as valid as the physical Aadhaar letter for purposes where Aadhaar is accepted.
Update Aadhaar details
Eligible demographic details can be updated through UIDAI's online services where supported.
Changes involving biometrics, such as fingerprints, iris data or photograph, require a visit to an Aadhaar centre.
Track Aadhaar requests
Residents can check the progress of enrolment or update requests using the relevant acknowledgement or request details.
Order an Aadhaar PVC Card
UIDAI allows Aadhaar holders to order a PVC version of Aadhaar.
The card includes security features such as a secure QR code, microtext, ghost image and embossed Aadhaar logo.
Locate an Aadhaar centre
UIDAI's website provides tools for finding Aadhaar enrolment and update centres.
This is particularly useful for services that cannot be completed online.
Check Aadhaar-bank linking status
Aadhaar holders can check the Aadhaar-bank linking status made available through NPCI using UIDAI's online service.
Use the Aadhaar App
UIDAI also provides an official Aadhaar App for Android and iOS.
The current app supports several Aadhaar management functions, including services related to demographic updates, e-Aadhaar, request tracking, authentication history and security controls.
Users should check the latest version of the official app before starting an update because available services and verification requirements may change.
What Security Features Does UIDAI Provide?
Aadhaar holders do not always need to share their complete Aadhaar number or leave all authentication methods active.
UIDAI provides several tools that give users more control over how Aadhaar is used.
Virtual ID
A Virtual ID or VID is a temporary 16-digit number associated with an Aadhaar number.
It can be used instead of the Aadhaar number for supported authentication and e-KYC transactions. The Aadhaar number cannot be derived from the VID.
Masked Aadhaar
Masked Aadhaar hides the first eight digits of the Aadhaar number and shows only the final four digits.
It can be used in situations where displaying the complete Aadhaar number is unnecessary.
Biometric lock
Aadhaar holders can restrict the use of their biometrics for Aadhaar authentication and enable them again when required.
Aadhaar number lock
UIDAI also allows users to temporarily lock authentication using their Aadhaar number. A VID can be used for supported authentication while the Aadhaar number remains locked.
Authentication history
Aadhaar holders can review authentication activity linked to their Aadhaar to check when it has been used for authentication.
How Do Aadhaar Authentication and e-KYC Work?
Aadhaar authentication and Aadhaar e-KYC are related to identity verification, but they serve different purposes.
Aadhaar authentication
Aadhaar authentication checks whether the identity information submitted for an Aadhaar holder matches the information available with UIDAI.
Depending on the permitted method, this may involve:
- OTP
- demographic information
- fingerprint
- iris
- face authentication
The authentication response confirms whether the submitted credentials match. It does not automatically mean that all Aadhaar information is shared with the requesting organisation.
Aadhaar e-KYC
Aadhaar e-KYC can be used by eligible and authorised entities for Know Your Customer processes under applicable rules.
Where permitted, identity information is shared electronically with the resident's consent.
UIDAI also provides Aadhaar Paperless Offline e-KYC. This allows an Aadhaar holder to generate digitally signed identity data that can be shared with a service provider for offline verification.
This offers another way to verify Aadhaar information without requiring the service provider to perform online Aadhaar authentication for that specific process.
Is Aadhaar Proof of Indian Citizenship?
No. Aadhaar is not proof of Indian citizenship.
Aadhaar establishes identity under the Aadhaar framework, subject to the eligibility requirements for enrolment. It does not determine citizenship, nationality or domicile.
This distinction is important because Aadhaar may be accepted as an identity document in many situations, but that does not make it a citizenship document.
For Aadhaar-related assistance, UIDAI provides several official support channels.
The toll-free Aadhaar helpline is 1947.
Users can also raise grievances through UIDAI's online grievance facilities and other authorised channels available on the official website.
For issues involving enrolment or updates, it helps to keep the relevant acknowledgement number, Service Request Number or other request details available when contacting support.
When accessing Aadhaar services online, users should use the official UIDAI or MyAadhaar website rather than unverified third-party pages.
Conclusion
UIDAI manages India's Aadhaar system, including Aadhaar issuance, enrolment, updates, authentication and security standards.
For Aadhaar holders, it also provides digital and physical service channels for managing Aadhaar information, checking requests and controlling how Aadhaar authentication can be used.
Knowing the difference between UIDAI and Aadhaar also makes it easier to understand where to go when you need to update, download, verify or secure your Aadhaar.
Frequently Asked Questions
Can I update my Aadhaar biometrics online?
No. Updates to fingerprints, iris data and photograph require a visit to an authorised Aadhaar enrolment or update centre.
What should I do if I lose my Aadhaar card?
You can download e-Aadhaar through UIDAI's official online services. You can also order an Aadhaar PVC Card if you want another physical copy.
Is e-Aadhaar valid without a physical Aadhaar card?
Yes. e-Aadhaar is digitally signed by UIDAI and is valid in the same way as the physical Aadhaar letter wherever Aadhaar is accepted.
Do I need my registered mobile number to use every UIDAI service?
No. Some UIDAI services can be accessed without a registered mobile number, while services requiring Aadhaar authentication generally need access to the registered mobile number or another prescribed verification method.
What is the UIDAI helpline number?
The toll-free Aadhaar helpline number is 1947.
Should I share a photocopy of my Aadhaar everywhere?
Aadhaar should be shared only when required for a legitimate purpose. Where appropriate, options such as Masked Aadhaar, VID or other permitted verification methods can reduce unnecessary sharing of the complete Aadhaar number.
