Security is one of the essential nonfunctional qualities of a software system. One of the most crucial aspects you learn in this book is that you should consider security from the beginning stages of application development. In chapter 1, we start by discussing the place of security in the development process of an application. Then, in chapter 2, I introduce you to the basic components of Spring Security’s backbone architecture by implementing a few straightforward projects.

The purpose of this part is to get you started with Spring Security, especially if you are just beginning to learn this framework. However, even if you already know some aspects of application-level security and the underlying architecture of Spring Security, I recommend you read this part as a refresher.