Presentation

brasscoffeeΤεχνίτη Νοημοσύνη και Ρομποτική

17 Νοε 2013 (πριν από 3 χρόνια και 10 μήνες)

90 εμφανίσεις

Geoff Lacy

Outline


Definition


Technology


Types of biometrics


Fingerprints


Iris


Retina


Face


Other


Voice, handwriting, DNA


As an SA

Definition


“Biometrics is the science and
technology of measuring and analyzing
biological data.”

http://searchsecurity.techtarget.com/definition/biometrics

How does Biometric tech work?


Biometrics do not create a picture to
compare to.


Makes use of a template.


Creates a template using an distinctive features


Login template


Challenge template


Sensitivity is based on


how close to the login


template the challenge


template is.


Sensitivity


False Accept Rate
or
False Positive Rate


the probability that the system incorrectly matches the input
pattern to a non
-
matching template in the database.


False Reject Rate
or
False Negative Rate


the probability that the system fails to detect a match
between the input pattern and a matching template in the
database.

Fingerprint


Most common Biometric


Optical scanning

and

Capacitance
scanning


Uses minutiae, or distinctive features.

Pros and cons of fingerprint


Pros


Cheap


Easy


Widely used


Most people are
comfortable with
providing
fingerprints


Can’t write down
fingerprint or forget
it



Cons


Can be faked


Mythbusters


Fingerprints can
be damaged


Iris


The iris is the colored ring
around the pupil of every eye
and no two are alike


Measures the pattern of the
colors in the iris


Some ATM’s use this
technology


United Arab
Emirates

IrisGuard's

Homeland
Security Border Control has
been operating in the United
Arab Emirates (UAE) since
2001, all customs agencies are
equipped with iris scanners.



Pros and cons of Iris


Pros


Iris recognition

is rarely
impeded by glasses or contact
lenses


It can be scanned from 10cm to
a few meters away.



The iris remains stable over
time as long as there are no
injuries and a single enrolment
scan can last


The iris is an internal organ that
is largely protected by damage
and wear by the cornea.



Cons


Can be faked


Been faked with a high
definition photos of a face


The accuracy of scanners
can be affected by changes
in lighting


Iris scanners are significantly
more expensive than some
other forms of biometrics.


http://www.findbiometrics.com/iris
-
recognition/

Retina


Retina is the back of the eye.


Measures the pattern of the
veins.


The idea for retinal
identification was first
conceived by Dr.

Carleton
Simon

and Dr.

Isadore
Goldstein

and was published
in the New York State Journal
of Medicine in 1935. The idea
was a little before its time, but
once

technology

caught up,
the concept for a retinal
scanning device emerged in
1975.

Pros and cons of Retina


Pros


Low occurrence of false
positives


Extremely low (almost
0%) false negative rates


Highly reliable because no
two people have the same
retinal pattern


Speedy results: Identity of
the subject is verified very
quickly


Very difficult to fake


Requires live tissue


Cons


Measurement accuracy can
be affected by cataracts or
severe

astigmatism


Not very user friendly

o
Scanning procedure is
perceived by some as
invasive

o
Subject being scanned
must be close to the
camera optics


High equipment costs


Face


Template created from Eigen
Faces.


2
-
D image


A newly emerging trend,
claimed to achieve improved
accuracies, is

three
-
dimensional face recognition.


This technique uses 3D sensors
to capture information about the
shape of a face. This information
is then used to identify distinctive
features on the surface of a face,
such as the contour of the eye
sockets, nose, and chin

Problems with Privacy


People don’t seem to like being identified from
cameras.


In January 2001, the city of Tampa, Florida used the
technology to scan the faces of people in crowds at
the Super Bowl, comparing them with images in a
database of digital mug shots. Tampa then installed
cameras equipped with face recognition technology in
their
Ybor

City nightlife district, where they have
encountered opposition from people wearing masks
and making obscene gestures at the cameras. In late
August 2001, a member of the Jacksonville, Florida
City Council proposed legislation to keep the
technology out of Jacksonville.

http://epic.org/privacy/facerecognition/

Voice, Handwriting, DNA


Voice


Never became
popular due to
background
sound issues









Handwriting


People often
change there
signature.
However popular
in some places.








DNA


Currently takes a
long time for
DNA results.


Maybe in a few
years it might be
more popular?

As a System Admin


If you need level three authentication.


Who you are


Biometrics is supposed to increase
confidentiality and availability.


Confidentiality is increased by securing the data
with better authentication techniques. Biometrics
is realistically impossible to brute force.


Availability is increased because it is easier to log
in with a biometric as opposed to a token card or
password.


What Security level do you need?


Is it within budget?