Use Your Body's Electrical Field To Uniquely Identify Yourself | DigitAG& journal |

You are unique. This is one of the more obscure ways you're unique: An alternating current of different frequencies running through you causes a reaction that's noticeably different from anyone else's. Researchers from Dartmouth University are trying to put this difference to use by creating wearable electronics that respond to--and only to--their intended user.

Via Sakis Koukouvis