Biometry

Overview

• Broad Overview on Biometric Criteria
• Facial recognition
  • Use, Scenario, Features
  • General course
  • Approaches
  • Summary
• Insights on Fingerprints
  • Features
  • Acquisition
  • Recognition
  • Demonstration
  • Problems

Short Introduction

• I biometry: the statistical analysis of biological

observations and phenomena (Merriam-Webster Online Dictionary)

• I biometric: a measurable, physical characteristic or

personal behavioral trait used to recognize the identity, or verify the claimed identity of a person

• I Three levels:
  • 1. I know something (passwords)
  • 2. I have something (tokens)
  • 3. I am something (biometry)

Classification

Two diffent modes must be distinguished:

• Identification “Who is it?”
• Authentication “Is it her?”

Quality indices

• False Rejection Rate (frr)
  • Rate of authentication

attempts from legitimate users that are rejected.

• False Acceptance Rate (far)
  • Rate of authentication

attemps from illegitimate users (e.g. attackers) that are accepted.

• Equal Error Rate (eer)
  • The eer equals the far

and frr when the system is configured so that far = frr.

• Failure to Enroll Rate (fer)
  • Rate of users that can’t

enroll into the system at all.