Authentication in the digital realm is becoming less and less secure as 'hackers' are finding alternative ways to gain entry to 'secure' accounts.

Within the cells of any organism is a substance called Deoxyribonucleic Acid (DNA) 
which carries the genetic information of a cell. This is completely unique to each individual - which can be important for identifying that you are in fact you.

Using DNA as a form of authentication is at this stage entirely conceptual, but experts have said that it could become very common in the foreseeable future.

see: http://tinyurl.com/mhwc99b