Spring Boot Security provides a powerful framework for securing your Spring Boot applications. Basic Authentication is one of the most straightforward methods of securing your application by requiring users to provide a username and password. In this guide, we'll explore Spring Boot Security's Basic Authentication, understand how it works, and provide sample code with explanations for its implementation.

Understanding Basic Authentication

Basic Authentication is a simple authentication mechanism in which the client sends a username and password with each request. The server then validates the credentials before allowing access to the requested resource. It's commonly used for securing APIs, web applications, and services.

Key Components of Spring Boot Security

Spring Boot Security is built on top of Spring Security and provides a flexible and comprehensive security framework. Key components include:

  • Security Configuration: Configure security rules, authentication providers, and access control in your application.
  • User Details Service: Implement a user details service to load user information from your data source.
  • Password Encoding: Store and validate passwords securely using various encoding techniques.
  • Authentication Filters: Use authentication filters to process incoming requests and perform authentication checks.

Implementing Basic Authentication

To implement Basic Authentication in a Spring Boot application, follow these steps:

  1. Add the Spring Boot Security dependency to your project's pom.xml (Maven) or build.gradle (Gradle) file:
<!-- Maven -->
// Gradle
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-security'
  1. Spring Boot Security is automatically configured with sensible defaults. You can further customize the security configuration by creating a class that extends WebSecurityConfigurerAdapter and overriding methods to define your security rules.
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
public class SecurityConfig extends WebSecurityConfigurerAdapter {
protected void configure(HttpSecurity http) throws Exception {
public UserDetailsService userDetailsService() {
PasswordEncoder encoder = PasswordEncoderFactories.createDelegatingPasswordEncoder();
UserDetails user = User.builder()
return new InMemoryUserDetailsManager(user);

In this example, we configure a basic security setup where URLs under "/public" are accessible without authentication, and all other URLs require basic authentication. We also define a user with the username "user" and password "password." You can replace this with your user data source as needed.


Spring Boot Security's Basic Authentication is a fundamental way to secure your applications and services. This guide introduced Basic Authentication, the key components of Spring Boot Security, and provided sample code for its implementation. As you delve deeper into security with Spring Boot, you'll discover more advanced features and customization options for building secure applications.