Spring Security Basic Authentication Interview Questions & Implementation
In this video, we deep dive into Basic Authentication in Spring Security and explain how it works behind the scenes, when to use it, and how it differs from form-based and session-based authentication.
We start with a quick recap of form authentication and session based authentication, then move step-by-step into Spring Basic Authentication, covering both theory and real implementation using Spring Security 6 and Spring Boot.
You’ll clearly understand stateless authentication, how Base64 encoding works, how encoded credentials are sent in headers, and how to securely store and validate users from a database instead of in-memory authentication.
🎯 What you’ll learn in this video:
✔️ What is Basic Authentication and where it should be used
✔️ When to use Basic Auth vs Form Login vs Session Authentication
✔️ Stateless Authentication explained with real examples
✔️ How Spring Security Basic Authentication works internally
✔️ Custom SecurityFilterChain configuration in Spring Boot
✔️ How to test Basic Authentication using Postman and Browser
✔️ What is Base64, how Base64 works, and why it is used
✔️ How to encode Base64 credentials and send them via HTTP headers
✔️ How to store database credentials securely
✔️ Integrating Database with Spring Security
✔️ Creating a User table and controlling API access
✔️ Configuring UserDetails, UserDetailsService, DaoAuthenticationProvider and PasswordEncoder
✔️ Custom UserDetails implementation in Spring Security
✔️ How passwords are handled internally
✔️ Using PasswordEncoder and BCryptPasswordEncoder
✔️ How to encrypt and secure passwords stored in the database
✔️ Configuring multiple users with different credentials
✔️ Understanding Spring Security Architecture
✔️ AuthenticationManager, AuthenticationProvider, Filters explained
✔️ Real-world implementation of the entire flow in IntelliJ
🚀 Who should watch this video?
This video is perfect for:
✔️ Java & Spring Boot developers
✔️ Backend engineers working on secure APIs
✔️ Anyone learning Spring Security from scratch
✔️ Developers preparing for Spring Security interviews
✔️ Developers confused about Basic vs Session Authentication
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