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As data travels through the user's clothing, handbag or shoes, anyone carrying a special card can unlock the door simply by touching the knob or standing on a particular spot without taking the card out.
Research engineer Mitsuru Shinagawa said future applications could include a walk-through ticket gate, a cabinet that opens only to authorised people and a television control that automatically chooses favourite programmes.
Read more: Japanese firm harnesses the power of human touch
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