An understanding of Spring Security

Spring Security offers authentication and authorization of our application using basic servlet filters. Web apps are vulnerable to security breaches and threats, as anybody who uses the Internet will access them. Any REST endpoints may have limited access to individual users, such as reviewing records or admin-related tasks, for example.
To secure URLs, we can use Spring Security. By providing efficient, flexible security features such as authentication and authorization, Spring Security is a security system that secures J2EE-based enterprise applications. For securing Spring-based software, it is the de-facto standard.
There are mainly four concepts on which spring security works

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