Using biometric methods, including an iris scan, the scheme is logging details of India's population on a central database.

BBC: Is India's identity number scheme unravelling?

If we could have a great big file with our credit card numbers, checking account funds, government ID, and Facebook profile information made accessible through an iris scan, many might just opt in.

FORBES: Could Iris Scanners Replace Our Wallets?

To get one of the Nexus ID cards and zip through airports and other border crossings, all you have to do is fill out a detailed application at a designated airport and submit to an interview, iris scan and fingerprinting.

FORBES: Evidently Delta Never Got the Memo On America's Express Border Crossing Program

Global's slightly larger version, about the size of a fist, called the iSwipe Mini, secures entranceways and can store 10, 000 iris identities, each compressed into a tiny 2-kilobyte file, and can scan 15 people per minute.

FORBES: Magazine Article