G G Ga a at t te e e A A Au u ut t to o om m ma a at t ti i io o on n n S S Sy y ys s st t te e em m ms s s ( ( (I I Ir r rl l l) ) )

nauseatingcynicalSecurity

Feb 22, 2014 (3 years and 4 months ago)

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Locall: 1890 74 75 76 Tel: +353 65 6841175 Fax: +353 65 23639
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Biometric Systems


What is Biometrics?

Biometrics is the science of measuring physical properties of living beings.

What is Biometric Authentication?

(1) Biometric authentication is the automatic recognition of a living being using
suitable body characteristics.
(2) By measuring an individual's physical features in an authentication inquiry
and comparing this data with stored biometric reference data, the identity of a
specific user is determined.
What are the requirements of a biometric feature used for
authentication purposes?

In the development of biometric identification systems, physical and behavioral
features for recognition are required which:
o
are as unique as possible, that is, an identical trait won't appear in
two people: Uniqueness
o
occur in as many people as possible: Universality
o
don't change over time: Permanence
o
are measurable with simple technical instruments: Measurability
o
are easy and comfortable to measure: User friendliness




What are the most well known biometric features used for
authentication purposes?


Biometric Trait

Description

Fingerprint

Finger lines, pore structure

Signature (dynamic)

Writing with pressure and speed differentials

Facial geometry

Distance of specific facial features (eyes, nose, mouth)
Iris

Iris pattern

Retina

Eye background (pattern of the vein structure)

Hand geometry

Measurement of fingers and palm

Finger geometry

Finger measurement

Vein structure of back of hand
Vein structure of the back of the hand

Ear form

Dimensions of the visible ear

Voice

Tone or timbre

DNA

DNA code as the carrier of human hereditary

Odor

Chemical composition of the one's odor

Keyboard strokes

Rhythm of keyboard strokes (PC or other keyboard)




What records biometric traits?

For recording and converting biometric traits to usable computer data, one needs
an appropriate sensor (see table). Of course, costs can greatly vary for different
sensors. However, we can't forget that many technical devices already have
sensors built in, and therefore, offer possibilities to measure biometric features
nearly free of cost.

Biometric Trait

Sensor

Fingerprint (Minutia)

capacitive, optic, thermal, acoustic, pressure sensitive
Signature (dynamic)

Tablet

Facial Structure

Camera

Iris pattern

Camera

Retina

Camera

Hand geometry

Camera

Finger geometry

Camera

Vein structure of the back of the Hand
Camera

Ear form

Camera

Voice (Timbre)

Microphone

DNA

Chemical Lab

Odor

Chemical sensors

Keyboard Strokes

Keyboard

Comparison: Password

Keyboard





What are the main uses of identification & verification?


Fighting Crime

Comparing evidence from a crime scene with previously or
subsequently recorded biometric data

Examples: Fingerprint, DNA
Security

• Verification of one's identity and granting authentication
• Example: granting access rights by voice and pass

Comfort

Identifying a person and changing personal settings accordingly

For example, setting the car seat, mirrors, etc. by facial recognition