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1 .This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?
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2 .Today lots of office doors open with smart cards, not keys.
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3 .Just wave your ID, and "open sesame."
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4 .Now you can do that with some smart phones, using an app called ShareKey.
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5 .It's based on Near Field Communication, or NFC--a way to send data wirelessly over short distances.
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6 .Many Android phones already have NFC chips built in.
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7 .Here's how ShareKey works.
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8 .After installing the app, you register with a central server.
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9 .In a hotel, that would be run by the front desk.
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10 .They'd verify your smart phone as an authorized guest, and send you an encrypted key—valid only for the length of your stay.
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11 .Then, wave your phone over your room's lock.
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12 .In just half a second, the lock verifies the key's authenticity and that the key is stored on your phone, not a thief's.
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13 .Want to let a friend in?
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14 .Ask the app to issue a new key linked to your friend's phone--and just text or e-mail it.
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15 .The researchers are presenting ShareKey in March at the CeBIT trade fair in Germany.
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16 .Researchers say ShareKey could be used for offices, homes or Zipcar.
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17 .Just make sure to keep your phone under lock and key.
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18 .Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.
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