Security Challenge in Cloud Computing

Cloud Computing is an internet based computing where virtual shared servers provide software, infrastructure, platform, devices and other resources and hosting to customer on a pay ?as?you-use basis. Users can access these services available on “Internet Cloud “without having any previous known how on managing the resources involved. But the major issue in the cloud computing is security. Several concerns which identify security requirements in cloud computing. This paper brings out an introductory review on cloud computing ,various services and security challenges in cloud computing. Confidentiality, Integrity, Availability, Authenticity, and Privacy are essential concerns for both Cloud providers and consumers as well. Infrastructure as a Service (IaaS) serves as the foundation layer for the other delivery models, and a lack of security in this layer will certainly affect the other delivery models, i.e., PaaS, and SaaS that are built upon IaaS layer. This paper presents an elaborated study of IaaS components’ security and determines vulnerabilities and countermeasures. Service Level Agreement should be considered very much importance.