Use case based approach for an integrated consideration of safety and security aspects for smart home applications

An increasing number of Cyber Physical Systems is used in different areas of applications like smart grid, smart factory or smart home. This paper demonstrates a first approach for an integrated consideration of safety and security for Cyber Physical Systems in a System of Systems by a use case based model for smart home applications. To realize a safe and secure operation of Cyber Physical Systems in System of Systems a high number of elements, relations and functions have to be taken into account. A Systems Engineering based approach will be introduced in this paper to deal with this complexity. The approach consists of a SysML based model which is associated with a procedure to ensure the safe and secure design of Cyber Physical Systems. Defined safety use cases will be used in a following security analysis and assessment. By harmonizing security assessment and safety use cases the integrated consideration is accomplished. The results can be used for an early technically solution neutral design planning.