Mladen [3] states that ―Cloud computing is a recent field, which came into existence after Years of research in networking and different types of computing. It uses a SOA, that minimized the information technology operating and maintenance cost for the clients, it offers greater flexibility, reduces capital costs, provides required services are along with many other characteristics. This study discusses issues associated with cloud computing along with Virtualization, Cyber infrastructure; Service oriented Architecture and end users. Implementation, research and security issues are studied in detail and key concerns have been identified. The study ranked security as the primary challenge in cloud computing. It is being observed that the users of cloud computing services are not satisfied with the current security mechanism in cloud computing. Service providers must assure the availability and reliability of services to the consumers available anytime, anywhere using internet, plus security, safety, data protection and Privacy is also exercised. The study further emphasizes that further research on security of cloud computing is required.