Spring Security

1. Authentication: Provides various authentication mechanisms like username/password, LDAP, OAuth, and more.
2. Authorization: Offers fine-grained access control based on roles, permissions, or custom rules.
3. Web Security: Protects web applications with features like form-based authentication, CSRF protection, and session management.
4. Method Security: Secures individual methods or service endpoints with annotations or expressions.

Before learning Spring Security, it's beneficial to have:

1. Java Programming: Proficiency in Java programming language and object-oriented programming concepts.
2. Spring Framework: Familiarity with the basics of the Spring Framework, including dependency injection and inversion of control.
3. Web Development: Understanding of web development concepts like HTTP, servlets, and MVC architecture.
4. Authentication and Authorization: Basic knowledge of authentication and authorization concepts, such as username/password authentication and role-based access control (RBAC).

By learning Spring Security, you gain the following skills:

1. Authentication and Authorization: Ability to implement secure authentication mechanisms and fine-grained authorization controls in Java applications.
2. Web Security: Proficiency in securing web applications with features like form-based authentication, CSRF protection, and session management.
3. Method Security: Capability to secure individual methods or service endpoints within applications using annotations or expressions.
4. Token-Based Authentication: Understanding of implementing token-based authentication mechanisms such as JWT and OAuth2 for securing APIs.