QoS (Quality-of-Service) is an important topic in cloud computing. It is very difficult to make a decision on choosing the cloud services depending on QoS requirements. These requirements have to be satisfied by both cloud service providers and cloud users. So, Optimal Service Selection is needed to obtain high quality cloud applications. With the increasing number of Cloud services, Quality-of...

Cloud computing changed the way of computing as utility services offered through public network. Selecting multiple providers for various computational requirements improves performance and minimizes cost of cloud services than choosing a single cloud provider. Federated cloud improves scalability, cost minimization, performance maximization, collaboration with other providers, multi-site deplo...

In this paper we present the cloud broker which can help decision makers assess the feasibility of adopting cloud computing in their organizations. It matches their requirements in terms of infrastructure, costs, geographic location and other requisite criteria, to the capabilities of the cloud service providers. Additionally, it allows them to test benchmark applications on selected cloud prov...

Cloud computing provides users near instant access to seemingly unlimited resources, and provides service providers the opportunity to deploy complex information technology infrastructure, as a service, to their customers. Providers bene t from economies of scale and multiplexing gains a orded by sharing of resources through virtualization of the underlying physical infrastructure. However, the...

Cloud computing promises the flexible delivery of computing services in a pay-as-you-go manner. It allows customers to easily scale their infrastructure and save on the overall cost of operation. However Cloud service offerings can only thrive if customers are satisfied with service performance. Allowing instantaneous access and flexible scaling while maintaining the service levels and offering...

The explosive growth of mobile users has been increasing in the past few years. In this paper, an efficient authentication scheme for distributed mobile cloud computing is proposed. This proposed scheme enables the users to access multiple service providers with a single private key. Instead of opting traditional public key cryptosystem like RSA, the proposed scheme uses bilinear pairing techni...

Cloud Computing is a paradigm to provide the services like Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). Virtualization technology plays an important role to provide these services. Due to lack of finance as well as requirement, data center providers are unable to establish data centers all over the world. To provide better Quality of Service...

This paper proposes a model to study the interaction of pricing and congestion in the cloud computing marketplace. Specifically, we develop a three-tier market model that captures a marketplace with users purchasing services from Softwareas-Service (SaaS) providers, which in turn purchase computing resources from either Provider-as-a-Service (PaaS) providers or Infrastructure-as-a-Service (IaaS...

Today, most large Application Service Providers (ASPs) such as Google, Microsoft, Yahoo, Amazon, Facebook, etc. operate multiple geographically distributed datacenters, serving a global user population that are often mobile. However, the servicecentric deployment and delivery semantics of these modern Internet-scale applications do not fit naturally into the Internet’s host-centric design. In t...

Web service and Cloud computing have significantly reformed the software industry. The need for web service allocation in the cloud environment is increasing dramatically. In order to reduce the cost for service providers as well as improve the utilization of cloud resource for cloud provider, this paper formulates the web service resource allocation in cloud environment problem as a two-level ...