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Multimodal Biometrics


There has been heated researches made to have multimodal biometrics be a method that overcomes the limitations of unimodal biometric technologies. Multimodal biometrics is recommended as a way to improve user authentication through biometrics of greater reliability.

a) Multiple Sensors
A single biometric feature can be extracted through different sensors. For instance, we can use optics-, ultrasound-, and semiconductor-based sensors.
b) Multiple Biometrics
A number of biometric features can be captured simultaneously for authentication. For example, facial and fingerprint identification can be used at the same time. However, this method is not recommended due to its high cost.
c) Multiple Units of the Same Biometric
Various units can be used for one biometric feature. Multiple units can often be provided by natural human physical structure such as through the user’s two irises and ten fingerprints. A disadvantage to this method is that it can make a user uncomfortable when capturing his or her biometric feature samples. The process can also take a long time.
d) Multiple Instances
This means that pieces of biometric information of one feature are taken at different instances by one sensor. One example of this method is to capture a fingerprint a number of times with a sensor or to sample a voice or a face multiple times for later use.
e) Multiple Representation and Matching Algorithms for the Same Biometric Input Signal
Multimodal biometrics requires more time to work with the information and develop an appropriate system than a unimodal biometrics does since several modules are put in use. For that reason, if a unimodal method can assure the users of high enough dependability in a given circumstance, it may not be necessary to employ a multimodal biometric method. If the greatest degree of reliability is required, however, it may become necessary to adopt a multimodal biometric method in order to ensure any possible advancement.
 

Biometrics authenticates and determines an individual’s identity by utilizing the uniqueness of his or her biological and behavioral characteristics. Other authentication methods often used are PIN method and Token (ID Card) method. Biometrics is superior to PIN or Token methods in the following ways:
 

Biometrics is includes fingerprints, hand or palm geometry, retina, iris, and facial characteristics, whereas behavioral characteristics include signature, voice (which also has a physical component), keystroke pattern, and gait.

While some technologies have gained more acceptance then others, it is beyond doubt that the field of access biometrics has gained a measure of acceptance.
 

 

  

Benefits :

For a high security site, they might require Multimodal Biometrics.

 

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