Will biometrics measure up to the future?

Who could forget the scene from Tsui Hark's 1997 B-movie "Double Team," where an imprisoned Jean-Claude Van Damme scrapes the skin off his index finger, attaches it to an impromptu mechanical contraption and booby-traps it to hit the scanner at precisely the scheduled time each morning, so that his captors don't notice his escape?

Indeed, biometric identification systems are a bit harder to fool than simply getting the password right. And as this technology advances, so do people's concerns over its true effectiveness. 

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