Learn how to secure backend applications using JWT, Spring Boot, and Spring Security in this comprehensive tutorial. Implement JWT access and refresh tokens while exploring key concepts including Spring Boot backend setup, Spring Security configuration, authentication and authorization mechanisms, and JWT implementation. Gain hands-on experience through step-by-step guidance covering everything from basic JWT principles to advanced topics like refresh token handling. By the end of this 2-hour tutorial, master the skills needed to build robust, secure Spring-based applications with industry-standard JWT authentication.