Biometrics refers to the automatic identification of a person based on their physiological characteristics such as fingerprints, face recognition, DNA, palm prints, retina, and voice recognition. It provides identification through measurable biological characteristics. Some common biometric technologies include fingerprints, iris recognition, hand geometry, retina scans, facial recognition and voice identification. While biometrics provide secure identification without keys, cards or passwords, they have disadvantages such as identical twins may match for some biometrics and voices or retinas can change over time.

2. WHAT IS BIOMETRICS
 BIOMETRICS REFERS TO THE AUTOMATIC
IDENTIFICATION OF A PERSON BASED ON
THEIR PHYSIOLOGICAL CHARACTERISTICS
PHYSIOLOGICAL are related to the shape of the
body . Finger print, Face recognition, DNA, Plam
print, Retina and Voice Recognition

3. Biometrics is the word derived from the Greek
word.
‘Bio’ means life and ‘metric’ means
measure.

4. Identity verification in computer system is PIN,
PASSWORD.
 In many cases KEYS, CHIP CARD, PIN,
PASSWORD are used for security verification.
 Things like keys, cards can be stolen and pins,
passwords to be forgotten or disclosed.
 To come over all these problems biometric security is
used.

5. Typesof Biometric SecurityTechnologies
 FINGERPRINT
 IRIS
 RETINA
 HANDGEOMETRY
 FACIALRECOGNITION
 SPEAKERVERIFICATION
 OTHERBIOMETRICTECHNOLOGIES LIKE HANDVIEN,PLAMPRINT,
DNA,EARSHAPE,bodyodor,fingernailbed e.t.c.

7. Fingerprint Technologies
It is the oldest of the all Biometric techniques.
In olden days they used PAPER-BASED
method.
Now, they are digitalized by using Optical,
Thermal, Ultrasonic principles.
Even twins have different fingerprints and no
two have the same fingerprint.

8. TYPES OF FINGERPRINT SENSORS

10. IRIS BIOMETRICS
Iris is the externally-visibly, colored ring around
the pupil.
The flowery pattern is unique for each
individual.
Even left and right eyes of any individual, have
unrelated IRIS pattern.
It is stable throughout the life.

12. Hand Geometry
 Hand geometry is a biometric that identifies users by
the shape of their hands.
 Dimensions and shape of the hand, fingers as well as
their relative locations
 While scanning two images are
taken one from the top and one
from the side

13. retina
Retina scan is the process of analyzing the
layer of blood vessels situated at the back of
the eye.
Retina scan machines are
fairly expensive.
It takes around 10 minutes to
scan retina.

14. Facial Recognition
It requires no physical interaction on behalf of
the user.
The system compares
1. Distance between eyes
2. Width of the nose
3. Depth of eye sockets
4. Length of jaw line

15. Speaker verification
 It’s a habitual speaking recognition.
 Voice recognition systems analyze differences such as
in pitch, tone.
 This biometric is also sensitive to environmental
Conditions such as
background noise .

16. Advantages of Biometrics
 Biometrics cannot be lost, stolen, forgotten. Biometrics
is consistent and permanent.
 It is also secure in that biometric itself cannot be
shared or used by others.
 There is no requirement to remember passwords, PINs.
 The biometric is always available to the individual
and unique.

17. Disadvantages of Biometric
 Face recognition system can’t tell the difference
between identical twins.
 Retinal scanning systems, are still uncomfortable for
the user.
 Peoples voice can change, background noises can
interfere.
 There are two types of errors-
a. FALSE REJECTION and
b. FALSE ACCEPTANCE

18. Conclusion
 BIOMETRICS play a major role in our daily life.
 But we should not depend totally on biometric
security.
 Even its unique for every one, it has many
disadvantages.