Netinfo Security ›› 2020, Vol. 20 ›› Issue (9): 57-61.doi: 10.3969/j.issn.1671-1122.2020.09.012

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Method of Network Security States Prediction and Risk Assessment for Industrial Control System Based on HMM

LI Shibin1(), LI Jing1, TANG Gang1, LI Yi2   

  1. 1. China Software Testing Center, Beijing 100048, China
    2. China Academy of Information and Communications Technology, Beijing 100191, China
  • Received:2020-07-16 Online:2020-09-10 Published:2020-10-15
  • Contact: Shibin LI E-mail:ustblsb@163.com

Abstract:

In this paper, the Hidden Markov Model is used to characterize the risk state transition relationship of an industrial control network attack scene, and the network risk state is predicted by the correlation probability between the risk state and the security alarm event. This paper defines the quantitative factors of network assets, threats and vulnerability and their calculation methods, normalizes the quantitative factors and applies them to the analysis of the overall risk value of the network. This paper constructs a simulation environment based on the typical four-layer industrial control system structure, and simulates and verifies the method by MATLAB. Experimental results show that the proposed method can be used in the dynamic assessment process of security states and risk value.

Key words: industrial control system, network security state, Hidden Markov Model

CLC Number: