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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