🇮🇳 India
India runs Aadhaar, the world's largest biometric ID system, covering well over a billion residents, supported by the mAadhaar app and DigiLocker document wallet. Aadhaar anchors welfare delivery, banking KYC, and tax linkage across the country.
Aadhaar is a 12-digit unique identity number issued to residents of India and is the world's largest biometric ID system. Backed by demographic and biometric data in the UIDAI repository, it is used for welfare delivery, banking KYC, and tax linkage, with the Aadhaar app (which replaced mAadhaar in 2026 and adds face authentication and QR-based offline sharing) and DigiLocker extending it to mobile.
See how it works →DigiLocker is a government cloud platform that lets residents store and share government-verified digital documents such as driving licences, vehicle records, and academic certificates. Sign-up and document fetch are authenticated using Aadhaar, and issued documents hold the same legal validity as physical originals.
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