University of Portsmouth
Cloud computing as a service-on-demand architecture has grown in importance over the previous few years. One driving force of its growth is the ever increasing amount of data which is supposed to outpace the growth of storage capacity. This way, public cloud storage services enable organizations to manage their data with low operational expenses. However, the benefits of cloud computing come along with challenges and open issues such as security, reliability and the risk to become dependent on a provider for its service. In general, a switch of a storage provider is associated with high costs of adapting new APIs and additional charges for inbound and outbound bandwidth and requests.