And experience. Knowing what to look for, even if it's just the HTML source of a web page, is rather important in the first steps of breaking the system. How do

And experience. Knowing what to look for, even if it's just the HTML source of a web page, is rather important in the first steps of breaking the system. How do you learn what to look for? Well, certainly there are blog posts and even playgrounds with virtual systems and components one can have a go at.