Fingerprint
More common in high-security vaults, fingerprint access systems are now protecting people's apartments and lifts in the AOL Time Warner Center in New York.
'This is the first time the technology has been used on this scale for people's homes. People choose fingerprint access for the combination of security and convenience', says Jason Nilles, fingerprint specialist at Bioscrypt.
You can now buy a fingerprint lock to fit on your own front door - they hit US shops in 2005.
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