The government of India has amassed a database of 200 million Indian residents’ digital fingerprints, iris scans, facial photographs, names, addresses and birthdates. Yet this vast collection of private information is only a drop in the bucket compared to the volume of data it ultimately intends to gather. The Unique Identity Authority of India (UIDAI), the agency that administers Aadhaar — India’s Unique Identity (UID) program — has a goal of capturing and storing this personal and biometric information for each and every one of India’s 1.2 billion residents. Everyone who enrolls is issued a 12-digit unique ID number and an ID card linked to the data.