Biometric authentication compares a registered biometric sample to a new one to verify identity. It involves capturing, processing, and enrolling biometric data. Common biometrics include voice recognition, iris recognition, fingerprint recognition, and face recognition. Each has its own advantages such as accuracy, security, ease of use, and cost effectiveness.

2. DEFINITION :
Biometric authentication requires to compare a registered or
enrolled biometric sample against a newly captured biometric
sample.
This is a three-step process (Capture, Process, Enroll)
followed by a verification or identification process.

3. PHASES OF BIOMETRIC AUTHENICATION :
Voice recognition
Iris recognition
Fingerprint recognition
Face recognition

4. 1. VOICE RECOGNITION :
The term voice recognition or speaker identification refers to
finding the identity of "who" is speaking, rather than what
they are saying.
Recognizing the speaker can simplify the task of translating
speech in systems that have been trained on a specific
person's voice or it can be used to authenticate or verify the
identity of a speaker as part of a security process.

5. ADVANTAGES :
It can help to increase productivity in many business.
It can capture speech much faster than you can type.
It is more accurate and trustworthy than passwords, which
are easy to forget, modify, or guess.
It has low operational costs.

6. 2. IRIS RECOGNITION :
Iris recognition is the process of recognizing a person by
analyzing the random pattern of the Iris.
The Iris is a muscle within the eye that regulates the size of
the pupil, controlling the amount of light that enters the eye.
It is the colored portion of the eye with coloring based on the
amount of melatonin pigment within the muscle.

7. ADVANTAGES :
No physical contact when scanning.
Accurate matching performance.
Can be captured from a distance with advanced software and
optics.
Difficult to spoof.

8. 3. FINGERPRINT RECOGNITION :
Fingerprint recognition refers to the automated method of
identifying or confirming the identity of an individual based
on the comparisson of two fingerprints.
Fingerprint recognition is one of the most well known
biometrics, and it is by far the most used biometric solution
for authentication on computerized systems

9. ADVANTAGES :
Uniqueness
Enhanced security
Easy to use
Accountability
Cost effectiveness

10. 4. FACE RECOGNITION :
A face recognition system is expected to identify faces
present in images and videos automatically.
It can operate in either or both of two modes:
Face verification (or authentication): involves a
one-to-one match that compares a query face image
against a template face image whose identity is being
claimed.

11. Face identification (or recognition): involves one-
to-many matches that compares a query face image
against all the template images in the database to
determine the identity of the query face.

12. ADVANTAGES :
Increasing safety and security
Preventing crimes
Reducing human interaction
Easier integration
Improved accuracy