In the high-tech heist film "Sneakers," a team of computer hackers attempts to physically break into the secured secret headquarters of a criminal organization. Among the various barriers protecting the facility, the team encounters a voice-recognition device that responds to the phrase, "My voice is my passport; verify me."

Biometric technologies confirm an individual's identity by comparing patterns of physical or behavioral characteristics against those enrolled and stored in computer records. Hollywood films and sci-fi novels are rife with futuristic scenarios in which biometrics are used to grant access to secured facilities or information, to monitor personal activity, to control machines or to identify individuals.

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