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Motorola’s senior vice president of advance research Regina Dugan, showed off an electronic tattoo at the D11 conference in May, pictured, designed as an alternative to traditional passwords, May 31, 2013 (Credit: All Things D/Motorola)

Motorola's senior vice president of advance research Regina Dugan, showed off an electronic tattoo at the D11 conference in May, pictured, designed as an alternative to traditional passwords, May 31, 2013 (Credit: All Things D/Motorola)