The use of biometric technology, which utitilises body characteristics to identify a person, goes back to the ancient civilisations of Egypt and China. However, modern-day biometrics has evolved thanks to the contribution of several minds. Joao De Barros, a European explorer is credited with recording the first known system of fingerprinting in the 14th century. Alphonse Bertillon, a policeman from Paris, studied body mechanics in an effort to identify criminals. In recent years, John Daugman, a physicist, has done pioneering work in developing the biometric iris recognition system. Owing to its accuracy, biometric systems are being used to help nab terrorists. Pakistan recently installed biometric systems at its border to keep a check on cross-border militancy from Afghanistan.