BioLynx, Inc.™

Biometrics and Enrollment

Overview

• Biometrics

• Hand Geometry and templates

• Enrollment

• Command Mode

BiometricsBiometrics

An automated method of identifying or

verifying the identity of an

individual using a physical

characteristic or behavioral trait

Characteristic or Trait?

• Characteristic is physical– Height / weight

– Eye color / iris pattern

– Shape of hand

• Trait is behavioral– Things we do

– Handwritten signature

– Keystroke recognition

– Speech

Verification vs. Identification

Do you know me?• Verification

– One to one

– Claim identity

– Quick

– Are you who you claim to be?

• Identification– One to many

– Search entire database

– Do I know who you are?

Hand GeometryHand Geometryand Templatesand Templates

What Is Hand Geometry?

• Unique size and shape of hand

• Not finger or palm prints

• Oldest biometric– 2D Identimat (1976)

• Most widely used biometric– More than 25,000

installed

Template Creation

• Enrollment

• Over 90 distinct measurements– Length

– Width

– Thickness

– Surface area

• Average of three hand placements

How it Works

Lights and Cameras

• Low level infra-red light

• Camera chip– Records image– Image appears as black

shadow

• Mirror/reflector determine hand position– Measure length, width,

surface area– Measure height with side

mirror

Mirror

Camera/IR Lights

Reflector

The Way We See It

Hand image/shadow

User’s hand

Hand readerLight Source / Flashlight

Verify and Score!

• Compare stored template with current placement

• “Score”– Difference between

memory & placement

– Successful verification

– Lower score means closer match

EnrollmentEnrollment

Enrollment

• Adds templates to HandPunch

• Hand placement– Key to successful

enrollment

– Bad placements produce verification problems

Hand Placement

• Flat hand

• Fingers closed around web finger pin

• LED lights on top panel extinguish

• Camera records digital image when all finger-pin lights out

Web finger pin

Rings and Fingernails

• Jewelry may be worn

• Stones must face upwards

• Long/false fingernails– Algorithm looks for

curvature of finger

– Curvature indicates change between finger and nail

Curvature of finger

Command ModeCommand Mode

A means of programming the HandPunch

which can be done only by a

HandPunch supervisor

Command Mode StructureSecurity Enrollment Management Setup Service

Password: 5 Password:4 Password:3 Password:2 Password:1

Special Enrollment Add Employee Supervisor Override Set Language Calibrate

Add Supervisor List Employees Set Date Format Status Display

Remove Employee Set User Data Set Time and Date

Restrictions Set Address

Set ID Length

Set Serial