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ILP security optimization method for embedded systems with timing constraints

Security is critical in the design of smart grid. In order to express security requirements of an application, we propose a novel graph model, Security Aware Task Graph (SATG), to represent real-time constraints and precedence relationships among tasks. Based on the SATG graph, we propose an optimal algorithm, Integer Linear Programming Security Optimization (ILPSO) to achieve the maximal overall security strength while satisfaction of the timing constraint. Experimental results demonstrate the correctness and efficiency of our proposed method.