A New Security-Oriented Multi-dimensional Assessment Method for Perception Layer of Electric Internet of Things

The electric Internet of things (IoT) is supporting the operation and maintenance of smart grid in much deeper and refined ICT-aided decision-making mode. However, known from the architecture of IoT, its two core functions (i.e., ubiquitous sensing and everything interconnecting) depend greatly on the infrastructural service in terms of secure sensing and reliable networking provided by its perception layer. Hence before reinforcing the core functions of electric IoT, it is more important for the operators of smart grid to know the security situations of its perception layer. Based on our previously proposed security-oriented assessment framework for the perception layer of the electric IoT, this paper designs a comprehensive security-oriented assessment method, which combines with the analytic hierarchy process (AHP) and the fuzzy comprehensive evaluation method. In practice, the proposed method gets the weight of the index by AHP and further reduces the dimension of the index system by fuzzy comprehensive evaluation. Finally, taking the smart substation site as an example, this method is used to assess the security-oriented of its power IoT perception layer and verify the feasibility and effectiveness of the method.