Industrial control system state machine construction method

An industrial control system and state technology, applied in general control systems, control/regulation systems, comprehensive factory control, etc., can solve the problem of high time and cost, and achieve the effect of improving efficiency and accuracy

Active Publication Date: 2022-01-28
HEBEI UNIV OF TECH
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Problems solved by technology

The state machine is an important part of protocol reverse, and its theoretical framework is extremely suitable for industrial control system security research, but the current protocol classification method has a high time cost

Method used

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  • Industrial control system state machine construction method
  • Industrial control system state machine construction method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] The invention provides a method for constructing a state machine of an industrial control system, the method comprising the following steps:

[0043] The first step, data preprocessing

[0044] According to the characteristics of the binary protocol, 1 bit is selected as the processing unit; when processing data, each unit is used as the basis for cutting; each unit of data is used as a feature, and the protocol command with the largest data length obtains a sequence with a length of m; The protocol command with the largest length is used as the benchmark, and the protocol commands with different data lengths are benchmarked in the way of zero bit compensation. The n protocol commands of a protocol packet are preprocessed to obtain an n×m two-dimensional matrix; The elements in the two-dimensional matrix are the coordinates of the high-dimension...

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Abstract

The invention discloses an industrial control system state mechanism construction method. The method starts from a clustering algorithm, adopts the most advanced BLOCK-DBSCAN algorithm, and improves both the speed and the accuracy. Moreover, a self-adaptive method for the clustering algorithm parameters of the DBSCAN is provided, the optimal matching parameters can be effectively and accurately found for the industrial control system, and the efficiency is greatly improved. Then a reward and penalty mechanism is utilized to re-classify clustering results, so that the problem that high-dimensional protocol information cannot be fully separated by a clustering algorithm is solved. Finally, the construction of the industrial control system state machine is achieved through the construction of the APTA tree, and the difficulty of the construction of the state machine is solved. According to the industrial control system state machine construction method, the construction problem of the industrial control system protocol state machine is solved, and a solid foundation is provided for intrusion detection of the industrial control system in the future.

Description

technical field [0001] The technical solution of the present invention relates to industrial control technology, specifically a method for constructing a state machine of an industrial control system. Background technique [0002] A finite state machine (finite-state machine, abbreviated as FSM), also known as a finite state automaton, referred to as a state machine, is a mathematical model that can represent a finite number of states and behaviors such as transitions and actions between these states. For applications in industrial protocol control systems, it is also called a protocol state machine. [0003] The BLOCK-DBSCAN clustering algorithm is an improved DBSCAN algorithm proposed in 2021. Compared with the existing clustering algorithms, its advantages are mainly reflected in its time complexity and accuracy advantages. It uses the covering tree algorithm to speed up the range query speed, and proposes the clustering discrimination concept of ε / 2 range norm ball. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41865G05B2219/32252Y02P90/02
Inventor 王嘉旭张磊诸葛琳娜
Owner HEBEI UNIV OF TECH
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