I THINK THEREFORE I ATM:

Researchers at Carleton University in Ottawa are trying to create a security system by which you could simply think your passwords and have the computer recognize your thoughts. The biometric device is still decades away from being properly functional, but scientists believe that brain-wave signatures will someday be used as “pass-thoughts.” A pass-thought could be any strong memory, for example of a piece of music, a piece of art, or your favorite video clip. More likely, the system would present you with a predetermined media clip to which you would simply think “yes” or “no” to gain access. (Wired)