Biometric
information is the information about a specific or individual person's
body. Hair colour and height are simple
examples of biometric information.
However for identification and recognizing purposes hair colour and
height are not very useful information because they change relatively rapidly and
quickly (hair colour is changed by dye, colour, by sunshine or by age; a
person's height varies throughout the day according to the pressure on the
spine). For identification or
recognizing purposes the most well known
type of biometric information is the fingerprint, these are used because it is
believed that no two people have the same patterns in the skin of their fingers
and the patterns are relatively constant and unchanged ; they might change a
little bit as a person gains or loses weight but the patterns remain
recognisable and unique. Another
commonly used form of biometric information is DNA sequences. DNA is the biological code that is present in
every cell of the human body and that describes each individual person.
