Authentication and Authorization are critical components of every online application, especially those created using the MERN stack (MongoDB, Express.js, React, Node.js). They aid in ensuring that only authorized users have access to specified resources or may execute specific activities within the program. To know more, check the MERN Stack Training in Noida.

1. AUTHENTICATION
AND
AUTHORIZATION
IN MERN STACK
APPLICATIONS
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2. Authentication and Authorization
are critical components of every
online application, especially those
created using the MERN stack
(MongoDB, Express.js, React,
Node.js). They aid in ensuring that
only authorized users have access
to specified resources or may
execute specific activities within the
program. To know more, check the
MERN Stack Training in Noida.
Authentication
and Authorization
in MERN Stack
Applications

3. Implementation of
Authentication and
Authorization in MERN
Stack Applications
The overview of the implementation of
Authentication and Authorization in
MERN Stack Applications has been
listed below for reference:

4. Authentication
Authentication can be referred to as the
process of verification of the identity of a
user. In a MERN Stack Application,
different authentication mechanisms like
username/password-based authentication
or social media authentication can be
put to use. The most common approach
is to use JSON web tokens (JWT) for
authentication.

5. • As soon as the user logs in with his valid login credentials, the
concerned server is known to generate a JWT which contains a
unique identifier for the user and signs it with a secret code.
• Following this, the server sends the JWT code back to the user
which securely stores it in a local storage or cookie.
• The client adds the JWT to the request headers for subsequent
requests to secured routes.
• Next, the server is given the task of verifying the authenticity as
well as the validity of the JWT by evaluating the expiration date
and signatures.
• If the JWT is proven to be valid, the user is held to be
authenticated by the server and is then allowed access to the
source asked for.

6. Authorization
Authorization is a process of defining
what the user can and cannot do
within a given application once
authenticated. It includes the
definition of roles, permissions, and
access levels for different resources
or routes.

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