This chapter was all about Web 2.0. AJAX and web services have played a very important role in revolutionizing the Internet. We started with AJAX and discussed the building blocks of an AJAX-based application. Then, we looked at security issues that arise due to multiple technologies that work together. We also covered web services that make it different from the usual web application. Next, we discussed the security issues an application may face with the introduction of a web service.

In the next chapter, we will discuss fuzzing and use different fuzzing technique to find out vulnerabilities in web applications.