Each individual record is between 4 and 8 megabytes; add in a pile of quality-control information and the database will ultimately hold in the neighborhood of 20 petabytes—that is, 2 x 1016 bytes. That will make it 128 times the size of the biggest biometrics database in the world today: the Department of Homeland Security’s set of fingerprints and photos of 129 million people.

Massive Biometric Project Gives Millions of Indians an ID


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