1.1 Introduction Clouds typically have highly dynamic demands for resources with highly heterogeneous and dynamic workloads. For example, the workloads associated with the application can be quite dynamic, both in terms of the number of tasks processed as well as computation requirements of each task. Furthermore, different applications may have very different and dynamic QoS requirements, for ...

Security of data is one of the main concern in the implementation of cloud computing. This paper proposes a highly effective and efficient cloud security model. The proposed security model keeps the most critical data on the private cloud and the rest of it on the public cloud. It uses hash codes to check the integrity of the data at the public cloud. The proposed cloud security model provides ...

I. Introduction A recent 2014 survey indicates cloud adoption by the enterprises continues unabated to about 94%[1]. These organisations are either running their applications on cloud or have started building their own cloud. Some of the popular commercial IaaS providers are Amazon Web Services(AWS), GoGrid, Microsoft Azure, Google Compute Engine, IBM Smart Cloud, Rackspace Open Cloud, HP enter...

Security and privacy are very important challenges for outsourced private data over cloud storages. By taking Attribute-Based Encryption (ABE) for Access Control (AC) purpose we use fine-grained AC over cloud storage. In this paper, we extend previous Ciphertext Policy ABE (CP-ABE) schemes especially for mobile and resource-constrained devices in a cloud computing environment in two aspects, a ...

One of the supreme perplexing problems of cloud service provisioning is to motivate users to believe and to trust the security of cloud service and upstream their sensitive data. Even though cloud service providers can say that their services are heavily protected by extravagant encryption methodologies, modern cloud systems still cannot convince the users that even if the cloud servers are exp...

Cloud Brokering is an emerging service in the cloud computing model. This is more evident in a federated cloud structure. A cloud broker is an entity (real or virtual) that manages the use, performance and delivery of cloud services, in addition to enabling the negotiations and relationships between cloud providers and cloud consumers. The definition is a simple one in concept, but as the cloud...

The paper proposes an architecture of a system automating the provisioning process of cloud computing infrastructures. Its structure and components are specified, based on an analysis of three types of requirements: infrastructure providers, service providers and end users. These considerations have led us to formulate a new infrastructural model, offered to end users as a collection of Virtual...

Cloud Computing provides facilities for storage, management, processing, and accessing information and other data stored in several system, platforms, applications etc . The above work represents the implementation of electronic hospital management system which enables date storage, update, retrieval, modification through cloud using the virtual private network which enhances the security of th...

Open source IaaS is hot topic in cloud computing and every year a new IaaS with a different design is announced. This paper provides a closer look into three common IaaS; Eucalyptus, OpenStack & Nimbus. OpenStack is currently the best choice of public cloud providers due to its aim at standardization and scalability while Eucalyptus is more appropriate for private cloud deployments.

Resource management in private clouds is a more challenging task than in public clouds. Because there are only finite resources in private cloud compare to public cloud with vast resources. Often, marginal resources are assigned to the application in the private cloud, which causes to the changes of service level of application executions. A resource management system is responsible for fulfill...