JWT (JSON Web Token) is a compact and self-contained way for securely transmitting information between parties as a JSON object. It’s widely used for authentication and authorization in modern web applications.
Key Components of JWT
Header:
Contains two parts: the type of token (JWT) and the signing algorithm being used (e.g., HMAC SHA256).
Payload:
Includes the claims, which are statements about an entity (typically the user) and additional data.
Types of claims:
Registered Claims: Predefined claims like iss (issuer), exp (expiration time), sub (subject), and aud (audience).
Public Claims: Claims defined by the users of the JWT.
Private Claims: Custom claims created to share information between parties that agree on using them.
Signature:
Ensures the token’s integrity by verifying that the token hasn’t been altered after it was signed.
Created by encoding the header and payload and signing them using a secret key.
How JWT Works in Spring Boot
User Authentication:
Upon logging in, the server authenticates the user. If successful, the server generates a JWT token containing information about the user’s identity and other claims.
Token Distribution:
The JWT token is sent to the client and typically stored in local storage or a cookie.
Token Usage:
For each subsequent request, the client includes the JWT token in the Authorization header (Bearer <token>).
Token Verification:
The server verifies the token’s signature and claims. If valid, the server processes the request; otherwise, it rejects the request.
Benefits of Using JWT
Stateless: No need to store session information on the server, as the token itself contains all the necessary data.
Scalable: Since JWT is stateless, it can be easily used in distributed systems.
Compact: JWTs are compact and can be easily transmitted in URLs, POST parameters, or inside headers.
Secure: When properly signed and verified, JWTs ensure data integrity and authenticity.
Common Use Cases
Authentication: Verify the identity of users.
Authorization: Provide access control by including user roles and permissions within the token.
Information Exchange: Securely transmit information between parties.
By leveraging JWT in a Spring Boot application, you can create a robust and secure system for handling user authentication and authorization, ensuring that your application is both efficient and scalable. SYED WASAY AYAZ
JWT (JSON Web Token) is a compact and self-contained way for securely transmitting information between parties as a JSON object. It’s widely used for authentication and authorization in modern web applications.
Key Components of JWT
iss
(issuer),exp
(expiration time),sub
(subject), andaud
(audience).How JWT Works in Spring Boot
Bearer <token>
).Benefits of Using JWT
Common Use Cases
By leveraging JWT in a Spring Boot application, you can create a robust and secure system for handling user authentication and authorization, ensuring that your application is both efficient and scalable.
SYED WASAY AYAZ
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