The Unique Identification Authority of India (UIDAI) today announced that the Aadhaar project has crossed a new milestone achieved by crossing the 125 crore mark. "This means that over 1.25 billion residents of India have the 12-digit unique identity," UIDAI said in a press release. The Aadhaar, with a unique identity number, was introduced in 2009. It is the world's largest biometric identification system.