Unique Identification Authority of India (under MeiTY)
Lok Sabha (Lower house of India's Parliament), Supreme Court (issued verdicts protecting voluntary registration and right to privacy)
Aadhaar is a 12-digit unique identity number used by residents or passport holders of India for digital identity authentication, based on their biometric and demographic data. During the authentication transaction, the resident’s record is first selected using the Aadhaar Number and then the demographic/biometric inputs are matched against the stored data which was provided by the resident during enrolment/update process. The UIDAI is responsible for Aadhaar enrollment, data storage within the Central Identities Data Repository (CIDR), and authentication, including operation and management of all stages of Aadhaar life cycle.