The emergence of biometric technology over the past decade has seen biometrics become a household name across multiple industries. It is almost rare now to run a day without using biometrics. From fraud prevention and user access to security and recognition, biometric technology has evolved into a complex authentication tool.
Gone are the days when fingerprint recognition was the only blueprint for biometric technology. Today, there are wide-ranging biometric options, such as Transmit Security biometric security, each designed to function uniquely.
In this article, we will outline the four major types of biometrics, with a highlight of how they work. We will also describe the pros and cons of each biometric type to help you identify the ideal technology for your organisation.
Defining Biometrics
Biometrics is the analysis and measurement of unique behavioural and anatomical traits of a person for automated identification. The technology is applied to recognise and authenticate individuals using specialised biometric systems. Usually, biometric systems are integrated into devices or tools, such as master keys, security cards, or badges, which are used with biometric scanning systems.
Generally, biometrics involves a vast array of physical and biological attributes of a person, including voice, calligraphy, eyes, ears, fingerprints, and veins. The idea is to use components of an individual rather than objects and passcodes to recognise or authenticate them.
Categories of Biometrics
Biometrics are categorised into two classes based on the type of identifiers applied. These categories include behavioural and physical (physiological) biometrics.
Behavioural Biometrics
In behavioural biometrics, behavioural patterns unique to individuals are used as identifiers for recognition and authentication systems. These patterns include walking posture, typing speed, speech rhythm, voice, signature, and handwriting.
In most cases, behavioural biometric systems are built with machine learning capabilities to master human patterns and identify individuals.
Physical Biometrics
Physical biometrics leverage the physiological traits unique to a person for identification. These attributes include irises, retinas, fingerprints, faces, hand geometry, and ears.
Biometric devices, such as sensors and scanners, are used to capture, convert, and store these traits in digital formats. When the biometric traits come into contact with the scanner or sensor, and a match is confirmed, the user is identified and automatically given access.
The Four Main Types of Biometrics
Here is an outline of the four most popular biometrics.
- Fingerprint Recognition
This is a physical biometric system that applies fingerprint scanners to authenticate users.
The technology behind fingerprint recognition is designed to capture such characteristics as the prints, thickness, width, length, shape, and surface area of the user’s fingers.
These features are then used to create a digital fingerprint biometric template unique to an individual, against which recognition is initiated.
The advantage of fingerprint recognition is that fingerprints are unique to individuals globally. Fingerprint scanners and sensors are also generally cost-effective.
However, fingerprint recognition can be a nightmare in the event of interference, damage, or loss of the user’s fingers.
- Voice Recognition
Voice recognition functions under the capacity of multiple physiological and behavioural attributes of a person. These traits include the shape of one’s vocal tract, accent, speaking pace, tone, and sound variations.
A blend of these characteristics creates a voice signature used for voice recognition.
While voice recognition is low-cost and highly convenient, enrolment in voice biometrics can be quite tedious. Again, any impact on the user’s voice structure can result in failed voice authentication.
- Facial Recognition
Facial biometrics utilise facial area features to identify and authenticate individuals. The technology collects unique data relating to a person’s facial structure, including the mouth, nose, eyes, and overall facial geometry.
Notably, facial recognition technology is designed to capture these elements in the aspects that they cannot be influenced by lighting, expressions, or age.
The good thing with facial biometrics is that users have limited interaction with facial sensors. However, in some cases, facial scanners can be impacted by facial accessories.
- Iris Recognition
This is considered the safest and most accurate biometric technology of all time. Iris recognition applies the unique patterns of the coloured, ring-shaped part of the eye to authenticate users.
The iris biometrics technology functions through infrared wavelengths to locate the pupil, eyelids, and eyelashes, then scan the iris to confirm identity.
While iris recognition requires close-range distances between the sensors and the user’s eye, its accuracy and security are the technology’s greatest leverage.
So What are the 4 Main Types of Biometrics?
Biometrics thrives on the prospect that people are generally unique. No one bears the physiological or behavioral makeup of the other. Consequently, biometric technologies utilise characteristics unique to every individual for recognition and authentication. Fingerprint, facial, voice, and iris biometrics comprise the most popular biometric systems globally.
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