Cloud computing adoption is rising fast. Flexibility, pay-per-use and available resources on-demand with the promise of lower ownership costs are a very attractive value proposition. On the other hand, Infrastructure as a Service (IaaS) providers, such as Amazon Web Services (AWS), are being asked for flexible cloud offerings while needing to answer to the security demand of their customers. Existing security solutions are not only time consuming for IT administrators, requiring advanced technical skills, but also were designed to implement static security perimeters for static infrastructures. At the time of elastic and programmable cloud IT infrastructure, a completely new approach to security is needed.