Cloud computing paradigm is a service oriented system that delivers services to the customer at low cost. Cloud computing needs to address three main security issues: confidentiality, integrity and availability. In this paper, we propose user identity management protocol for cloud computing customers and cloud service providers. This protocol will authenticate and authorize customers/providers ...

Advancements in computing and communication technologies have promoted acceptance of cloud computing paradigm in the domain of distributed and high performance computing systems. Because of fast revolutions and availability of state of the art computing technology, and increasing market competition, it has become necessity for service providers to serve the cloud based services in competent way...

Cloud computing is a multi-billion business, with more than 100 cloud service providers [1] vying for supremacy. Businesses are overwhelmed with choices and tradeoffs. In this paper we offer a qualitative and quantitative assessment of leading cloud service providers (CSPs) to guide small and medium businesses (SMBs) in their choice of CSP. Our qualitative study of usability, reliability, and c...

In our previous work we designed and evaluated the feasibility of highly secure and dependable identity providers (IdPs) for the increasing requirements of future IT infrastructures. In this position paper we extend our previous work by analyzing and discussing the benefits of deploying highly secure and dependable identity providers-as-a-service (IdP-as-aService), without compromising the conf...

Cloud is becoming the next-generation computing paradigm for enterprises to deploy services and run business. While most Cloud service providers promise some Quality of Service (QoS) through a Service Level Agreement (SLA), it is very hard for Cloud clients to know what impacts these QoS have on their businesses. In this paper, we study this issue by conducting a simple performance evaluation o...

Cloud promises users that they can present and deploy IT services in a pay-as-you-go fashion in an open and virtualized cloud environment while saving huge capital investment in their own IT infrastructure. In this sense, protection of users’ privacy is critical and has become one of the most concerned issues as otherwise users may eventually lose the confidence and passion of deploying cloud i...

The advantages of Cloud computing, such as cost effectiveness and ease of management, encourage companies to adapt its services. However, In a Multi-Cloud environment, the wide range of Cloud services and user specific requirements make it difficult to select the best composition of services. An automated approach is required to deal with all phases of service coordination including discovery, ...

The availability of public computing resources in the cloud has revolutionized data analysis, but requesting cloud resources often involves complex decisions for consumers. Under the current pricing mechanisms, cloud service providers offer several service options and charge consumers based on the resources they use. Before they can decide which cloud resources to request, consumers have to est...

Today's era is now embracing the cloud computing as a new emerging technology. As a matter of fact the cloud computing technologies are now playing a very vital role in almost every commercial as well as non-commercial field; including large or small-scale businesses, IT organizations, Government, Quasi-Government, Public and Private sectors. In a cloud environment the service provision is usua...

Cloud computing is an evolving paradigm which is becoming an adoptable technology for a variety of applications. However, cloud infrastructures must be able to fulfill application requirements before adopting cloud solutions. Cloud infrastructure providers communicate the characteristics of their services to their customers through Service Level Agreements (SLA). In order for a real-time applic...