We started this chapter by introducing you to some of the important concepts that are needed to follow along with it. We then covered the important characteristics needed in a modern web application. We quickly covered an architecture called SOFEA, which aptly covers how we would like to build modern applications. We then got our hands dirty by implementing security for REST APIs in the simplest of ways.
In the following section, we covered how we can secure a REST API in a more advanced fashion employing OAuth, using a JWT. We started this section by introducing many concepts in regards to OAuth and finally concluded the chapter with a full-fledged sample project that uses OAuth and JWT.
After reading this chapter, you should have a clear understanding of REST, OAuth, and JWT. You should also be comfortable with using Spring Security in the next chapter, to secure the RESTful endpoints exposed in your application.