Something You Were - 3 Factors of Fail (part 4)

   Today we'll continue our discussion on problems in the world of authentication.  Here are links to parts 1, 2 and 3.

   The 3rd form of authentication is typically called Something You Are.  We typically think of this as some kind of biometric indicator like fingerprints.  But this is probably the earliest and most basic form of authentication used in human or animal species.

   Animal species can identify members by sight, but more often scent or sound.   In addition to the traditional 5 senses, some animals have senses that humans do not, like echolocation, to help identify "friend or food".  Here are some interesting articles.

   Human babies can identify their mother by smell and sound.  People have used visual recognition as a primary identification method for most of the existence of the human race.  Of course, visual recognition can be spoofed. And there are other reasons why visual recognition may not be the best identification method.