Are we really protected against hackers?

We hear a lot about security products such as antivirus, IPS, IDS and more. What is the reality of these products? Do they offer absolute security? What is their evolution history? In this article we are going to answer these questions by introducing the importance of security, the general life cycle of an attack, the security shield created by a developer to stop the danger of hacking, and finally by revealing the truth of the notion of security.