What is the main function of the Spring Security module in Spring-based applications?

The main function of Spring Security is to provide authentication and authorization in Spring-based applications. This module allows:

• Verifying the identity of a user (authentication).
• Determining what actions and resources are accessible to the user (authorization).
• Protecting the application from common threats such as CSRF, sessions, etc.

Spring Security integrates with various authentication mechanisms (forms, OAuth2, LDAP, etc.) and offers flexible security configurations through annotations and configuration.