Chief Security Officers (CSOs) must recognize they do not have full control of the resources and question the inherent security of the Cloud. Cloud Computing is not fundamentally insecure; it just needs to be managed and accessed in a secure way. All Cloud Models can be segmented into Software as a Service (Saas) and Platform as a service (PaaS) The following check-list of Cloud Security Challenges provides a guide for Chief Security officers who are considering using any or all the Cloud models.”]