JWT- JSON Web Token
Kamrul Hasan
Full Stack Developer | Skilled in Frontend, Backend, and Database Management
What is JSON Web Token?
(JWT) JSON web tokens are a popular way to enforce authorization in web applications. Authorization is the process of determining whether a user is allowed to access a particular resource. In a JWT-based authentication system, the server generates a JWT for each user after they log in. Then every subsequent request the user makes to the server includes the JWT. The server can then validate the JWT to determine if the user is authorized to access the requested resource.
How JWT works?
Here is an example of how JWT can be used for authorization. Suppose a user wants to access a protected resource, such as a user's profile page. The user first logs into the application. The server then generates a JWT for the user and includes it in the response. The user then sends the JWT with each subsequent request made to the server. The server then validates the JWT to determine if the user is authorized to access the requested resource.
JWT comprises three encoded parts: Header, Payload, and Signature. It can be passed as a URL or POST parameter, or in an HTTP header. Due to JWT's lightweight, self-containing, and versatile structure, it remains a popular tool for information exchange and authentication.
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