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Information physical integration system security risk assessment method

A cyber-physical fusion and risk assessment technology, which is applied in the field of cyber-physical fusion system security risk assessment, can solve problems such as difficulty in determining security risk assessment, and achieve the effect of avoiding risks

Active Publication Date: 2018-06-19
NANJING FORESTRY UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a cyber-physical fusion system security risk assessment method for the defects and deficiencies of the prior art, which solves the problems that are difficult to determine in the security risk assessment of the cyber-physical fusion system, including the cyber-physical fusion system being attacked by network security. It can deduce the system failure that can be caused by cyber-physical fusion system security attacks, and supports the integrated analysis of security (Security) and safety (Safety), and supports graphical processing , easy to use, has important practical value

Method used

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  • Information physical integration system security risk assessment method
  • Information physical integration system security risk assessment method
  • Information physical integration system security risk assessment method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings.

[0043] see as figure 1 -- Figure 4 As shown, this embodiment includes the following steps:

[0044] 1. Construct the dynamic fault tree of the cyber-physical fusion system; use the dynamic fault tree to construct the failure causal chain of the cyber-physical fusion system.

[0045] Specifically include the following steps:

[0046] The establishment method of the dynamic fault tree of the cyber-physical fusion system is expressed as follows: firstly, take the least expected fault state in the cyber-physical fusion system as the target of logical analysis, that is, determine the top event; secondly, find out all the possible causes of the current fault state The direct cause of the intermediate event is to determine the intermediate event; again, continue to search for all possible direct causes of these intermediate fault events until all component states that cau...

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Abstract

The invention relates to an information physical integration system security risk assessment method, and belongs to the technical field of the information physical integration system. The method comprises the following steps: constructing a dynamic fault tree of an information physical integration system; constructing an attack tree model of the information physical integration system; constructing an attack-fault mapping table; and integrating the dynamic fault tree model and the attack tree model according to the attack-fault mapping table to establish an Attack-DFTs model. The attack-faultis comprehensively assessed, so that the influence on the physical system by the network attack can be accurately estimated through the security risk assessment, thereby giving out improvement suggestions for avoiding the risk.

Description

technical field [0001] The invention relates to a safety risk assessment method for a cyber-physical fusion system, belonging to the technical field of cyber-physical fusion systems. Background technique [0002] Cyber ​​Physical Systems (CPS) is a multi-dimensional complex system that integrates computers, networks, and physical environments. Through the organic integration and deep collaboration of 3C (Computation, Communication, Control) technologies, it can realize real-time perception, Dynamic control and information services have been widely used in industrial control fields such as electric power, petroleum and petrochemical, and nuclear energy. In these typical cyber-physical fusion systems, there are a large number of information processing and network communication subsystems, so that attackers may take advantage of faults in software and communication components to gain control of the system, interfere with the correct behavior of the system, and damage the key fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/24
CPCH04L41/14H04L41/145H04L63/1408H04L63/1458
Inventor 徐丙凤
Owner NANJING FORESTRY UNIV
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