a6a065eda36b4703e3a1f76edf4526da by 2025

Author:2025
Language: eng
Format: epub
Published: 2025-03-09T15:05:55+00:00

Chapter 4 JSON Web tOkeN (JWt) autheNtiCatiON

To prevent tampering, it’s crucial to use robust and secure algorithms for signing tokens. Signing secrets must be kept confidential, and if public-key cryptography is used, the private key must remain secure.

JWTs are commonly used to implement secure authentication and authorization mechanisms in modern web applications, APIs, and single sign-on (SSO) systems.

We can now start to build an example to show how to secure a REST

API using JSON Web Token (JWT) using Spring Security v6, Spring Boot v3+, and PostgreSQL DB.

As the first step, let’s download and install PostgreSQL from https://

www.postgresql.org/download/windows/.

1. How Do We Create a New DB and User

in PostgreSQL?

To create a new DB named “jwtsecuritydb” with username = postgres and password = postgres, use the following commands:

postgres=# create database jwtsecuritydb;

postgres=# create user postgres with encrypted password

‘postgres’;

postgres=# grant all privileges on database jwtsecuritydb to postgres;

Figure 4-2 shows that our new PostgreSQL DB is up and running.

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