Quoting the article “Now researchers at the University of Washington have found a way to eliminate the airtime and the hassle—by using the human body as a conduit for passing security codes from one device to another. By holding a smartphone in one hand, for example, and touching a doorknob with the other, a person could securely and instantly transmit the code that unlocks the door.”
Read more here:
http://www.wsj.com/articles/can-passwords-be-sent-through-the-human-body-1475851616
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