Unlocking doors with your hand :O

Unlock your house with only your HAND: Amazing new system turns entire body into 'wire' that can electronically open doors

BodyCom uses the body as a wire to transmit an unlock code from a digitally signed fob in the user's pocket to a touch pad on whatever needs to be accessed.

Full Story:
http://www.dailymail.co.uk/sciencetech/article-2291487/How-body-house-key-New-makes-flesh-blood-link-digital-authentication-process.html