Biometric Security Systems ppt

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Submitted By:
Odisha Electronics Control Library
Seminar
On
Biometric Security Systems

Content
 Introduction
 Overview
 Classification of BIOMETRICS
 Odor and Scent cognitive systems
 Facial cognitive systems
 Performance cognitive systems
 Handwriting recognition
 Factors for determining characteristics
 Functions of biometric systems
 The Future
 Reference

•Biometrics = bios + metron. Bios means life and metron
means measure.
•Recognizing humans based on physical and behavioral
traits.
•Also called BEHAVIOMETRICS.

Biometrics are used to identify the input sample when compared to a
template, used in cases to identify specific people by certain characteristics.
1)possession-based
using one specific "token" such as a security tag or a card
2)knowledge-based
the use of a code or password.
Layered systems combine a biometric method with a keycard or PIN.
Multimodal systems combine multiple biometric methods, like an iris
scanner and a voiceprint system.

Physiological are related to the
shape of the body.
Behavioral are related to the
behavior of a person.
Cognitive biometrics is based
upon brain responses to stimuli. Classification of some biometric traits

• The use of blood hounds and other scent following dogs to
identify individual people or their scent trails in the
environment on the basis of a previous offered reference scent
article such as handkerchief, hat, and other items of clothing.
• Canine scent identification evidence is usually accepted in
court to suggest the unique identification of an accused
individual in the same way that finger prints are used.
• It is based on "individual odor theory," which hold that each
person has a unique scent that can be identified by the dog and
related back to a specific individual.

• Conventional biometric methods introduced to improve security
are mainly based on cross matching the face of the person with that
recorded in their identification materials.
• However, it is possible to train persons that could be referred to as
"face-minders", to memorize faces of suspects on a watch-list.
Trainees could acquire skills of cross-matching key features of faces
of persons seen at the ports as compared to that in the forensic facial
database.

Task performance using general intelligence must elicit responses in neural anatomic
structures for processing of the information. Working memory is typically associated
with activations in the prefrontal cortex (PFC), anterior cingulate, parietal and occipital
regions.
These brain areas receive blood supply from the middle cerebral arteries. Two
fundamental working-memory processes have been identified:
1)The passive maintenance of information in short-term memory
2)The active manipulation of this information
A pattern of blood flow velocity changes is obtained in response to a set intelligence
task, which is used to form a 'mental signature' that could be repeatedly recognized, in
an automated man-machine interface system.The device could be used as a 'lie detector'
based on the fact that, it could distinguish Wrong ANSWER from Correct ANSWER.

• Systems that measure hand and finger geometry use a
digital camera and light. To use one, we simply place
your hand on a flat surface, aligning your fingers against
several pegs to ensure an accurate reading.
• Then, a camera takes one or more pictures of your
hand and the shadow it casts. It uses this information to
determine the length, width, thickness and curvature of
your hand or fingers. It translates that information into a
numerical template.
• Fingers are less distinctive than fingerprints or irises
and people’s hands change over time due to many
reasons.
A hand geometry scanner

This Tablet PC has a signature verification system.
• Biometric systems don't just look at how
you shape each letter. They analyze the act
of writing. They examine the pressure you
use and the speed and rhythm with which
you write. They also record the sequence in
which you form letters.
•A handwriting recognition system's sensors
can include a touch-sensitive writing surface
or a pen that contains sensors that detect
angle, pressure and direction.

• Voice is unique for an individual because of
the shape of his/her vocal cavities and the way
they move their mouth when they speak.
• Voiceprint is a sound spectrogram, not a
wave form.
• Some companies use voiceprint recognition
so that people can gain access to information
or give authorization without being physically
present.
Speaker recognition systems use spectrograms
to represent human voices.

• It consists of a simple CCD digital camera. It
uses both visible and near-infrared light to
take a clear, high-contrast picture of a person's
iris.
• Usually, our eye is 3 to 10 inches from the
camera. When the camera takes a picture, the
computer locates:
i. The center of the pupil
ii. The edge of the pupil
iii. The edge of the iris
iv. The eyelids and eyelashes
It then analyzes the patterns in the iris and
translates them into a code.
Eye anatomy

•To use a vein recognition system, you simply
place your finger, wrist, palm or the back of
your hand on or near the scanner. A camera
takes a digital picture using near-infrared light.
•The hemoglobin in your blood absorbs the
light, so veins appear black in the picture. As
with all the other biometric types, the software
creates a reference template based on the shape
and location of the vein structure.
• Vein scans for medical purposes usually use
radioactive particles. Biometric security scans,
however, just use light that is similar to the light
that comes from a remote control Vein scanners use near-infrared light
to reveal the patterns in a person’s veins.

Universality
each person should have the characteristic
Uniqueness
is how well the biometric separates individually from
another.
Permanence
measures how well a biometric resists aging.

Collectability
ease of acquisition for measurement.
Performance
accuracy, speed, and robustness of technology used.
Acceptability
degree of approval of a technology.
Circumvention
ease of use of a substitute.

The basic block diagram of a biometric system
The main operations a system can
perform are enrollment and test.
• Enrollment
During the enrollment,
biometric information from an
individual is stored.
• Test
During the test, biometric
information is detected and
compared with the stored
information
It is the interface b/w real world and
system. Collects necessary data
based on the characteristic.
It removes artifacts from the data
obtained from sensor to enhance the
input.
It extracts the necessary features. Correct features are to
be extracted and in the optimal way.
A vector of numbers or an image is used to create a
template. A template is the synthesis of all
characteristics extracted.
Compares the obtained template with
other existing templates, estimating the
distance between using any algorithm.

 Verification
Authenticates its users in conjunction with a smart card, username or
ID number. The biometric template captured is compared with that stored
against the registered user either on a smart card or database for verification.
 Identification
Authenticates its users from the biometric characteristic alone
without the use of smart cards, usernames or ID numbers. The biometric
template is compared to all records within the database and a closest match
score is returned. The closest match within the allowed threshold is deemed
the individual and authenticated.

• False accept rate/False match rate(FAR/FMR)
The probability that the system incorrectly declares a successful match
between the input pattern and a non-matching pattern in the database. It measures the
percent of invalid matches.
• False reject rate/False non-match rate(FRR/FNMR)
The probability that the system incorrectly declares failure of match between
the input pattern and the matching template in the database. It measures the percent of
valid inputs being rejected.
• Receiver operating characteristic/relative operating characteristic
The ROC plot is obtained by graphing the values of FAR and FRR, changing
the variables implicitly. A common variation is the Detection error trade-off (DET),
which is obtained using normal deviate scales on both axes.

• Equal error rate/Crossover error rate(EER/CER)
When quick comparison of two systems is required, the ERR is commonly
used. Obtained from the ROC plot by taking the point where FAR and FRR have the
same value.
• Failure to enroll rate(FTE/FER)
Failure to enroll happens when the data obtained by the sensor are
considered invalid or of poor quality.
• Failure to capture rate(FTC)
the probability that the system fails to detect a biometric characteristic when
presented correctly.
• Template capacity
The maximum number of sets of data which can be input into the system..

• Privacy
A concern is how a person’s biometric, once collected, can be protected. Another
concern is that if the system is used at more than one location, a person's
movements may be tracked as with any non-anonymous authentication system.
• Biometrics Sensors’ obstacles
It is very difficult to create standard on identical encryption paths. Biometrics
standard can be obtained only if the common information is unconcealed.
• Marketing
Despite confirmed cases of defeating commercially available biometric
scanners, many companies marketing biometric products claim the products as
replacements, rather than supplements, for passwords. Consumers and other end
users must rely on published test data and other research that demonstrate which
products meet certain performance standards and which are likely to work best
under operational conditions.

• Sociological concerns
Physical
Some believe this technology can cause physical harm to an
individual using the methods, or that instruments used are
unsanitary. For example, there are concerns that retina
scanners might not always be clean.
Personal Information
There are concerns whether our personal information taken
through biometric methods can be misused.
•Danger to owners of secured items
If the item is secured with a biometric device, the damage to the owner
could be irreversible, and potentially cost more than the secured property.

• Interoperability
• Over reliance: The perception that biometric systems are foolproof might
lead people to forget about daily, common-sense security practices and to
protect the system's data.
• Accessibility: Some systems cant be adapted for certain populations, like
elderly people or people with disabilities.
Interoperability: In emergency situations, agencies using different systems may
need to share data, and delays can result if the systems can't communicate with
each other.

If biometric data is obtained, for example compromised from a database, by
unauthorized users, the genuine owner will lose control over them forever and lose
his/her identity.
one ordinary advantage of password does not exist in biometrics. That is re-issue. If a
token or a password is lost or stolen, they can be cancelled and replaced by a newer
version i.e. reissued. On the other hand, this is not naturally available in biometrics.
Cancelable biometrics is a way in which to inherit the protection and the replacement
features into biometrics.
Several methods for generating cancellable biometrics have been proposed.
Essentially, cancelable biometrics perform a distortion of the biometric image
or features before matching. The variability in the distortion parameters
provides the cancelable nature of the scheme.

• Australia
• Brazil
• Germany
• Iraq
• Israel
• Japan
• United States

•Some hospitals use biometric systems to make sure mothers
take home the right newborns
•New methods that use DNA, nail bed structure, teeth, ear
shapes, body odor, skin patterns and blood pulses
•More accurate home-use systems
•Opt-in club memberships, frequent buyer programs and rapid
checkout systems with biometric security

Reference
 www.google.com
 www.wikipedia.com
 www.oeclib.in

Biometric Security Systems ppt

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