The proliferation of cloud providers has brought substantial interoperability complexity to the public cloud market, in which cloud brokering has been playing an important role. However, energy-related issues for public clouds have not been well addressed in the literature. In this paper, we claim that the broker is also situated in a perfect position where necessary actions can be taken to ach...

Cloud computing has redefined the way in which Spatial Data Infrastructures (SDI) and Web geoportals are designed, managed, and maintained. The cloudification of a geoportal represents the migration of a full-stack geoportal application to an internet-based private or public cloud. This work introduces two generic and open cloud-based architectures for auto-scalable Web geoportals, illustrated ...

Cloud computing opens new perspectives for small-medium biotechnology laboratories that need to perform bioinformatics analysis in a flexible and effective way. This seems particularly true for hybrid clouds that couple the scalability offered by general-purpose public clouds with the greater control and ad hoc customizations supplied by the private ones. A hybrid cloud broker, acting as an int...

In recent years, a Cloud computing system has been popularly used. Among them, a hybrid Cloud is focused, which combined a public Cloud operated by service providers and a private Cloud constructed inside a company. Because a private Cloud is considered to be secure and a public Cloud is scalable, it is possible to build a Cloud computing system that works effectively by combining the both type...

Cloud services allow for hosting applications partially or completely in the Cloud by migrating their components and data. Especially with respect to data migration, a series of functional and non-functional challenges like data confidentiality arise when considering private and public Cloud data stores. In this paper we identify some of these challenges and propose a set of reusable solutions ...

An important basis for cloud computing are public IaaS cloud services as offered e.g. by Amazon, Rackspace, VmWare. Since IaaS cloud services are often used as a flexible infrastructure for SaaS cloud services, it is important to investigate IaaS cloud services as a basis to realise regulatory requirements in cloud computing, e.g the European Data Protection Directive and the E-Privacy Directiv...

Federating Cloud systems is an urgent need of the Public Sector. In this paper, we showcase a recent Cloud Federation-as-a-Service solution empowered by blockchain technology. This solution is used by the Italian Ministry of Economy and Finance to realise a cross-Cloud application for payslip calculation of Police Forces. Blockchain offers decentralised means to conciliate the need of keeping d...

Public cloud technologies have been widely adopted by start-ups and small businesses due to their low cost, flexibility and brief set-up time required for the infrastructure. For larger established enterprises, however, the infrastructure set-up time is less of a concern, particularly where private cloud hosting and virtualization have reduced provisioning time considerably. In such organizatio...

As cloud computing becomes increasingly popular among enterprises, organizations, and developers, it is time to consider how Software as a Service solutions can be built rapidly and cost-effectively. This paper presents the possibility of using a service-based architecture operating within the framework of the public cloud computing model and implementing Software as a Service. It also describe...

as organizations of all sizes and types consider the adoption of public and private cloud computing, they need to be confident that their security concerns can be addressed. Cloud computing environments inherently introduce a high degree of resource sharing among disparate workloads, and in the case of public clouds, that sharing includes unknown outside parties. Therefore, it is vital that the...