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The re-perimeterization and the erosion of trust boundaries already happening in organizations is amplified and accelerated by Cloud Computing. Cloud service models employed, operational models, and technologies used to enable Cloud services may present additional risks and requirements to an organization compared to traditional IT solutions. This paper focuses on Cloud security management issues and interoperability challenges for Collaborative Clouds. Based on a comprehensive requirements analysis, we intendified Cloud security management domains, integrating various Cloud security services of an organization and providing interoperability to identified stakeholders, in order to guideline Cloud activities within an organization. Furthermore we present the status quo of current approaches, systems and standards, with a special focus to objects within the Cloud Security Management Infrastructure (CSMI) that have to be managed and integrated by a Cloud security management system.