Spring Boot 3 + Spring Security 6 : JWT Authentication & Authorization (2024)

Spring Boot | JWT | Spring Security

you’ll learn how to implement JWT authentication and authorization in a Spring Boot 3.0 application using Spring Security 6 You’ll see how easy it is to secure your application and protect your endpoints using JSON Web Tokens Step-by-step guides.

JWT, or JSON Web Token, is a compact, self-contained means of representing claims to be transferred between two parties securely. In the context of authentication and authorization, JWT is often used to authenticate users and to grant them access to resources or services. Here’s a breakdown of how JWT works in authentication and authorization:

1. Authentication
JWT can be used for authentication by issuing a token to a user upon successful login. The token contains information about the user, typically in the form of claims. These claims may include the user’s ID, username, role, or any other relevant information. The process typically involves the following steps:

- User logs in with their credentials (e.g., username and password).
- The server validates the user’s credentials.
- Upon successful authentication, the server generates a JWT containing user claims.
- The JWT is…