WHAT IS THE MOST AC­CU­RATE TYPE OF BIO­MET­RIC IDEN­TI­FI­CA­TION?

BBC Earth (Asia) - - Q&a -

Bio­met­ric tech­nolo­gies are de­signed to recog­nise you, act­ing like a pass­word to give you ac­cess to a com­puter sys­tem or pass through a se­cu­rity sys­tem.

Some lis­ten to your voice or ex­am­ine your sig­na­ture, some read fin­ger­prints or mea­sure faces, some ex­am­ine reti­nas or study your brain­waves, some even mea­sure the ge­om­e­try of your hands or the shape of your ears. DNA iden­ti­fi­ca­tion may seem very ac­cu­rate but only tiny parts of your DNA are ex­am­ined dur­ing a

DNA pro­fil­ing test, and it is easy for sam­ples to be­come con­tam­i­nated with other DNA, so it might only be ac­cu­rate to one in a few thou­sand. The most ac­cu­rate ap­proach will al­ways be to use sev­eral meth­ods in com­bi­na­tion, be­cause the chances of you hav­ing the same shaped face, the same fin­ger­print and the same retina as an­other per­son are in­finites­i­mally small. PB

Iris recog­ni­tion is just one of many pos­si­ble forms of

bio­met­ric iden­ti­fi­ca­tion

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