Biometric Modality Selection


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To be able to select a proper biometric system, you need to compare them on various aspects. You need to assess the suitability of the systems to your requirements in terms of convenience, system specifications and performance, and your budget.

You can select best suitable biometric system by studying various criteria for their effectiveness.

Criteria for Effective Biometric System

There are seven basic criteria for measuring effectiveness of a biometric system −

  • Uniqueness − It determines how uniquely a biometric system can recognize a user from a group of users. It is a primary criterion.

  • Universality − It indicates requirement for unique characteristics of each person in the world, which cannot be reproduced. It is a secondary criterion.

  • Permanence − It indicates that a personal trait recorded needs to be constant in the database for a certain time period.

  • Collectability − It is the ease at which a person’s trait can be acquired, measured, or processed further.

  • Performance − It is the efficiency of system in terms of accuracy, speed, fault handling, and robustness.

  • Acceptability − It is the user-friendliness, or how good the users accept the technology such that they are cooperative to let their biometric trait captured and assessed.

  • Circumvention − It is the ease with which a trait is possibly imitated using an artifact or substitute.

Comparison of Various Biometric Modalities

Let us compare all the biometric system in the following terms −

Biometric Characteristic Universality Uniqueness Permanence Collect-Ability Performance Accept-ability Circum-vention
Finger Print Medium High High Medium High Medium High
Face Recognition High Low Medium High Low High Low
Hand Geometry Medium Medium Medium High Medium Medium Medium
Iris Recognition High High High Medium High Low High
Retinal Scan High High Medium Low High Low High
DNA High High Medium High High Low Low
Keystroke High Low Low High Medium High High
Signature Low Low Low High Low High Low
Voice Medium Low Low Medium Low High Low

You can select an appropriate biometric system depending upon the criteria you need to deal with as shown in the table.

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