As you're swiping your boarding pass ( or smartphone), the machine also scans it for particle-sized traces of explosive materials and sends the all-clear or no-go in less than two seconds.

ENGADGET: Hitachi boarding gate can sniff explosives on passes, keep the transport queues flowing (video)

Walking in I pass a dour-looking lady, clipped to the machine by her affinity card, mesmerized by the spinning wheels.

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In addition, you should consider avoiding plaintext-password network services: The POP3, FTP, and Telnet daemons pose a special risk because their passwords pass unencrypted across the open network, sniffable by any nearby machine along the way.

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