Abstract-The emergence of a closer relationship between cloud service providers in the cloud computing market is the inevitable consequence of the computing as utility concept. The closer cooperation creates competitive advantages for providers and users of cloud services as well. Capacities and services can be used in a collaborative and flexible way. Despite the numerous potentials of composite cloud services, trust, policy and privacy are the major challenges resulting from the distributed and flexible data handling. The paper derives requirements and solutions in the field of inter-cloud service communication with a special focus on security. The proposed architecture is evaluated with a sample collaborative business process of inter-cloud service interaction.
Abstract-Today's business is more and more organized in collaborative networks. Although decision makers know the benefits of collaboration, they are afraid of losing control of their data, which is one of the main impediments for Cloud Computing. We propose a novel cloud based approach for collaboration in business processes with guaranteed control of the privacy of the data. The platform ensures the compliance with the companies' privacy policies and laws. The paper shows the definition of privacy policies and how they are converted into a well established access control language. An example helps to clarify the methods.
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