This article is an editorial note submitted to CCR. It has NOT been peer reviewed. The author takes full responsibility for this article’s technical content. Comments can be posted through CCR Online. This paper discusses the concept of Cloud Computing to achieve a complete definition of what a Cloud is, using the main characteristics typically associated with this paradigm in the literature. More than 20 definitions have been studied allowing for the extraction of a consensus definition as well as a minimum definition containing the essential characteristics. This paper pays much attention to the Grid paradigm, as it is often confused with Cloud technologies. We also describe the relationships and distinctions between the Grid and Cloud approaches. Categories and Subject Descriptors

Cloud computing is an upcoming efficient networking computing environment. Our work proposes sharing an application across various clients of a host system via cloud computing. The sharing is performed between the host storage system and the remote storage system in a cloud computing environment. The Host storage device of the host system is updated to retrieve the application from the remote storage device that is shared through cloud computing environment. The application now can be accessed by the host processing devices. The application can be implemented on the host processing device without requiring any installation of the application on the host processing device. A bunch of function calls are performed between the operating system of the host processing device and the application residing on the host storage device. The system has a cloud interface between remote and host machines to update the host storage device about any changes in the application at the remote storage device. This leads to the better utilization of the cloud bandwidth and the host resources such as storage, processors etc.

Cloud computing allows people the way to sharing distributed resources and services that belong to various organizations and sites. The cloud computing has its own concept, technical, economic and user experience characteristics. The service oriented, loose coupling, strong fault tolerant, business model and ease use are main characteristics of cloud computing. In this paper, proposed a method to build a trusted computing environment for cloud computing system by integrating the trusted computing platform into cloud computing system and pay attention to the security requirements in cloud computing environment. Some important security services, including authentication, confidentiality and integrity, are provided in cloud computing system. Keywords cloud computing; grid computing; service oriented; loose coupling; strong fault tolerant; business

Abstract—The easiness of managing and configuring resources and the low cost needed for setup and maintainingCloud services have made Cloud Computing widespread. Several commercial vendors now offer solutions based on Cloud architectures. More and more providers offer new different services every month, following their customers needs. Anyway, it is very hard to find a single provider which offers all services needed by end users. Furthermore, different vendors propose different architectures for their Cloud systems and usually these are not compatible. Very few efforts have been done in order to propose a unified standard for Cloud Computing. This is a problem, since different Cloud systems and vendors have different ways to describe and invoke their services, to specify requirements and to communicate. Hence a way to provide a common access to Cloud services and to discover and use required services in Cloud federations is appealing.mOSAIC project addresses these problems by defining a common ontology and it aims at developing an open-source platform that enables applications to negotiate Cloud services as requested by users. The main problem in defining the mOSAIC ontology is in the heterogeneity of terms used by Clouds vendors, and in the number of standards which refer to Cloud Systems with different terminology. In this work the mOSAIC Cloud Ontology is described. It has been built by analysing Cloud standards and proposals. The Ontology has been then refined by introducing individuals from real Cloud systems. I.