The advantage of using Rails is agility; that make developing your web applications easily and quickly. Security on Rails using established security principles to teach how to write secure software, defend your application from common threats, and encrypt your data. In addition, you will see how to integrate your application with external management systems, in the short term, important details you should consider to protect yourself and your data. What matters most of the security element for the plan to attack it before it becomes a problem. Security on Rails beginners and intermediate help developers to take control of their applications and guard against.