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The erosion of trust boundaries already happening in organizations is amplified and accelerated by Cloud computing. One of the most important security challenges is to manage and assure a secure Cloud usage over multi-provider Inter-Cloud environments with dedicated communication infrastructures, security mechanisms, processes and policies. This paper focuses on the identification of functions for different roles within future Inter-Cloud environments that belongs to the Cloud Security Management functional spectrum. Therefore, we describe all identified functional aspects and the distribution of these objects in order to define a platform independent model for the Security Management functional spectrum for Inter-Cloud called SMICS. SMICS will assist Cloud providers to analyze the necessary further development for their security management systems in order to support future Inter-Cloud environments. In addition, the better comprehension of the security management spectrum from a functional perspective will enable the Cloud provider community to design more efficient portals and gateways between Inter-Cloud providers itself respective their customer, and facilitate the adoption of this results in scientific and standardization environments.